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Toggle navigation Chris Wirz * Software * Management UNDERSTANDING LINUX RELEASES AND UPGRADES Posted in software by Christopher R. Wirz on Tue Aug 03 2021 The release and flavor of linux you use is less important than the kernel. Read More COMPILING PGAUDIT IN VISUAL STUDIO 2019 Posted in software by Christopher R. Wirz on Mon Apr 12 2021 There are many tutorials to compile PGAudit on Windows, but using Visual Studio and an installed version of PostgreSQL, it is dead simple. Read More NET SNMP 5.9 IN DOCKER Posted in software by Christopher R. Wirz on Fri Aug 21 2020 Net SNMP 5.9 includes blumenthal-aes, which provides cisco compliant AES256 for SNMP testing. Read More SELLING THE IDEA OF CODE COVERAGE TO A CUSTOMER Posted in engineering by Christopher R. Wirz on Wed Apr 01 2020 Code coverage is best practice and a worthy investment - but how do you convince the customer? Read More INTERRUPT PERFORMANCE CONSIDERATIONS IN DOTNET (C#) Posted in software by Christopher R. Wirz on Thu Jun 20 2019 The interrupt pattern is often viewed as less performant than graceful checking... But what if the exception case rarely happens? Read More CALLING EXCEL FROM C++ IN 2019 Posted in software by Christopher R. Wirz on Fri Jan 18 2019 C++ performs efficient data processing, and Excel helps with data exploration. For Visual Studio 2019, you can still use C++ to call the Excel API. Read More USING IMAGEMAGICK TO RESIZE IMAGES IN DOTNETCORE 2.0 Posted in software by Christopher R. Wirz on Sat Dec 29 2018 Sometimes System.Drawing doesn't work in your runtime environment. ImageMagick is an alternative. Read More RESIZING GRAPHICS FOR IOS 12 LOADING IMAGE USING DOTNETCORE 2.0 Posted in software by Christopher R. Wirz on Fri Dec 28 2018 With the latest iOS12+, new image assets have been added to support iPhone X+ resolutions. You can make these images easily in an AWS Lambda function using DotNetCore 2.0. Read More OPENCV CONVOLUTION (FILTER2D) DOES NOT ROTATE Posted in software by Christopher R. Wirz on Sat Dec 22 2018 Some libraries produce image convolutions assuming the kernel is rotated 180 degrees - OpenCV does not. Read More THE ADORNER PATTERN IN C++ Posted in design-patterns by Christopher R. Wirz on Sun Dec 02 2018 The adorner pattern lazily adds properties without dealing with the overhead of inheritance Read More CUSTOM FIELDS FOR TFS WORK ITEMS Posted in software by Christopher R. Wirz on Tue Nov 27 2018 With Work Item Tracking Administration (witadmin), you can modify XML definition files to support the On-premises XML process model. For an overview of process models and what is supported. Read More A C# P/INVOKE ALTERNATIVE THAT WORKS WITH A PLUGIN ARCHITECTURE Posted in software by Christopher R. Wirz on Thu Nov 15 2018 PInvoke is fine if you only have one DLL, but what if you have a PlugIn Architecture? Read More C++ PLUGIN ARCHITECTURE IN UBUNTU 18.04 Posted in software by Christopher R. Wirz on Mon Oct 15 2018 Using shared object files, dynamic linking at runtime can be used to create a PlugIn architecture. Read More C++ PLUGIN ARCHITECTURE IN WINDOWS 10 Posted in software by Christopher R. Wirz on Wed Oct 10 2018 Using a compiled DLL with a C-Style API, you can create a PlugIn architecture using the Windows API. Read More ADDING GET/SET LOGIC TO BRACKET [] OPERATOR OVERLOADS IN C++ Posted in software by Christopher R. Wirz on Tue Sep 25 2018 Using a pointer wrapper, set/get logic can be added to array-like classes which implement the bracket [] operator. Read More ACTIVEMQ ON WINDOWS NANOSERVER USING DOCKER Posted in software by Christopher R. Wirz on Wed Sep 12 2018 Using a multi-stage build, you can run ActiveMQ in a Windows NanoServer Docker container. Read More NODEJS ON WINDOWS NANOSERVER USING DOCKER Posted in software by Christopher R. Wirz on Tue Sep 11 2018 Using a multi-stage build, you can take certain benefits of a larger image and use select features on the image which ultimately gets deployed. Read More REFERENCE COUNTING CLASS OBJECTS IN C++ Posted in software by Christopher R. Wirz on Wed Jul 04 2018 In C++ objects can be passed by value or reference. But what if the object holds reference to allocated memory? Read More LINQ-ING XML SPECIFIC TYPES (AND HOW TO OVERCOME A .NET BUG) Posted in software by Christopher R. Wirz on Thu Jun 28 2018 Fixing the "The specified type was not recognized: name=" bug. Read More SIMPLEIMAGECACHE IOS SWIFT4 REFRESH Posted in software by Christopher R. Wirz on Wed Jun 06 2018 SimpleImageCache allows a UIImageView to update when an image is downloaded or retrieved from disk. Read More CUDA TEMPLATE KERNELS USING ATOMICADD Posted in software by Christopher R. Wirz on Sun May 27 2018 Newer CUDA versions allow for C++ style template kernels, but this capability needs to be wrapped to enable templated C style API functions. Read More BUILDING INSTALL TARBALLS FOR UBUNTU CONTAINERS Posted in software by Christopher R. Wirz on Fri May 25 2018 When you deploy docker containers on edge networks, it is helpful to keep the install files with them - but you also have to include all dependencies. Read More RUNNING A WCF SERVICE IN DOCKER Posted in software by Christopher R. Wirz on Tue May 22 2018 Windows Communication Foundation (WCF) services in docker containers. Read More PROJECT HIGHLIGHT: FFMPEG-WINDOWS-BUILD-HELPERS Posted in software by Christopher R. Wirz on Fri May 04 2018 The ffmpeg-windows-build-helpers allows you to easily configure and run the FFmpeg build chain. Read More A REVIEW OF RUMA HAS IT: REWIRED USER-SPACE MEMORY ACCESS IS POSSIBLE! Posted in reviews by Christopher R. Wirz on Wed Apr 18 2018 RUMA (Rewired User-space Memory Access) allows for physiological data management such that developers can freely rewrite mappings from virtual to physical memory. Read More A REVIEW OF MACROBASE PRIORITIZING ATTENTION IN FAST DATA Posted in reviews by Christopher R. Wirz on Fri Apr 13 2018 MacroBase is a data analytics engine that analyzes and aggregates important and unusual behavior - acting as a search engine for fast data. Read More A REVIEW OF GROUND: A DATA CONTEXT SERVICE Posted in reviews by Christopher R. Wirz on Wed Apr 11 2018 Previous database design focused on tight control of schemas, but this hasn’t kept up with how databases are currently being used. Read More A REVIEW OF MASM: EFFICIENT ONLINE UPDATES IN DATA WAREHOUSES Posted in reviews by Christopher R. Wirz on Wed Apr 11 2018 The need for 24x7 operations in global markets and the rise of online and other quickly-reacting businesses make concurrent online updates increasingly desirable. Read More A REVIEW OF ORPHEUSDB: BOLTON VERSIONING FOR RELATIONAL DATABASES Posted in reviews by Christopher R. Wirz on Fri Apr 06 2018 Datasets with version history allow for analysis of data at each stage. Read More A REVIEW OF GECKOFTL: SCALABLE FLASH TRANSLATION TECHNIQUES FOR VERY LARGE FLASH DEVICES Posted in reviews by Christopher R. Wirz on Wed Apr 04 2018 SSD Page Validity Bitmap (PVB) in the Flash Translation Layer (FTL) under-performs a LSM tree. Read More A REVIEW OF THE END OF A MYTH DISTRIBUTED TRANSACTION CAN SCALE Posted in reviews by Christopher R. Wirz on Sun Mar 11 2018 Using RDMA, distributed database systems may actually scale linearly. Read More A REVIEW OF SKIPPING ORIENTED PARTITIONING FOR COLUMNAR LAYOUTS Posted in reviews by Christopher R. Wirz on Fri Mar 09 2018 As the volumes of data in the average database system (DBS) continues to grow, modern database systems use mechanisms such as data skipping to improve performance. Read More A REVIEW OF THE TILEDB ARRAY DATA STORAGE MANAGER Posted in reviews by Christopher R. Wirz on Fri Mar 02 2018 TileDB is a storage manager for multi-dimensional arrays - suitable for scientific applications. Read More A REVIEW OF THE ADAPTIVE RADIX TREE: ARTFUL INDEXING FOR MAIN-MEMORY DATABASES Posted in reviews by Christopher R. Wirz on Wed Feb 28 2018 As memory becomes less expensive (specifically if a system has many nodes), many databases can fit into RAM. Read More A REVIEW OF FAST SCANS ON KEY-VALUE STORES Posted in reviews by Christopher R. Wirz on Fri Feb 23 2018 Key-Value stores (KVS) are popular because they can scale horizontally with high through-puts and low latency. Read More A REVIEW OF MONKEY: OPTIMAL NAVIGABLE KEY-VALUE STORE Posted in reviews by Christopher R. Wirz on Wed Feb 21 2018 Key-value stores backed by an LSM-tree have trade-offs between lookup cost, update cost, and memory consumption. Read More A DEMONSTRATION OF OBJECT POINTERS IN C++ Posted in software by Christopher R. Wirz on Sun Feb 18 2018 Pointer incrementing moves differently through memory based on the structure you are pointing to. Read More A REVIEW OF ACCESS PATH SELECTION IN MAIN-MEMORY OPTIMIZED DATA SYSTEMS: SHOULD I SCAN OR SHOULD I PROBE? Posted in reviews by Christopher R. Wirz on Fri Feb 16 2018 Access Path Selection (APS) for filtering operations has been a key component of database systems. Read More A REVIEW OF H2O: A HANDS-FREE ADAPTIVE STORE Posted in reviews by Christopher R. Wirz on Wed Feb 14 2018 Modern state-of-the-art database systems are designed around a single data storage layout. H2O is adaptive. Read More C API STRING ARRAY RETURNS IN C++ Posted in software by Christopher R. Wirz on Mon Feb 12 2018 Certain C APIs use the much-dreaded triple pointer to return an array of strings (character arrays). Read More A REVIEW OF VECTORH: TAKING SQL-ON-HADOOP TO THE NEXT LEVEL Posted in reviews by Christopher R. Wirz on Fri Feb 09 2018 Actian Vector in Hadoop (VectorH for short) is a new SQLon-Hadoop system built on top of the fast Vectorwise analytical database system Read More ATTACHING AN INSTALLATION CD TO A VM USING POWER CLI (VMWARE) Posted in software by Christopher R. Wirz on Thu Feb 08 2018 Using PowerShell, a VM can have an install CD automatically attached. Read More A REVIEW OF HYBRID OLTP AND OLAP ON COMPRESSED STORAGE USING BOTH VECTORIZATION AND COMPILATION Posted in reviews by Christopher R. Wirz on Wed Feb 07 2018 This work aims at reducing the main-memory footprint in high performance hybrid OLTP and OLAP databases. Read More VM MANAGEMENT THROUGH POWER CLI AND C# Posted in software by Christopher R. Wirz on Tue Feb 06 2018 VMWare PowerShell Command Line Interface (CLI) can be used to automate VM deployment. Read More LITTLE ENDIAN INDEXING IN C++ Posted in software by Christopher R. Wirz on Sun Jan 28 2018 In C++ bit shift operators help show bytes and bits are laid out low to high (on x86 anyway). Read More DOCKER COMMANDS GETTING STARTED Posted in software by Christopher R. Wirz on Sat Jan 13 2018 These commands make use of the Docker Command Line Interface (CLI) to build up and take down a Docker environment. Read More A REVIEW OF MORSEL-DRIVEN PARALLELISM Posted in reviews by Christopher R. Wirz on Thu Dec 28 2017 Databases face the challenge of taking advantage of many cores and working across multiple threads Read More STARTING AND DEBUGGING PROCESSES PROGRAMMATICALLY IN C# WITH ENVDTE Posted in software by Christopher R. Wirz on Mon Dec 18 2017 EnvDTE lets you debug into processes by attaching them to an already-running debug application. Read More ADDING A COLUMN TO A DATAFRAME BASED ON WEB DATA IN PYTHON IN AZURE ML Posted in software by Christopher R. Wirz on Fri Oct 13 2017 AzureML allows for Python Execution modules, which can be used to fetch Web Data. Read More .NET STANDARD 2.0 INITIALIZER STRING GENERATION USING REFLECTION Posted in software by Christopher R. Wirz on Sun Sep 24 2017 Using reflection, you can generate the C# code used to reproduce an instance of your class objects' public members. Read More BASIC USE OF LABELIZER USING PANDAS IN PYTHON Posted in software by Christopher R. Wirz on Sun Sep 17 2017 Labelizer turns categorical data into numerical columns that can be modeled in sykit learn. Read More INHERITED SEQUENTIAL LAYOUT IN C++ Posted in software by Christopher R. Wirz on Sat Sep 16 2017 Inheritance has gaunted precedence for memory layout in C++. Read More BASIC NORMALIZATION USING PANDAS IN PYTHON Posted in software by Christopher R. Wirz on Fri Sep 15 2017 It is best practice to normalize the data, but these methods aren't exposed out-of-the-box. Read More NO PRIVACY IN C++ Posted in software by Christopher R. Wirz on Mon Sep 11 2017 C++ uses sequential memory, which is fast by provides access to private fields - whether you like it or not. Read More C SHARP REFLECTION HACK TO CALL ANY CLASS OR ANY METHOD. Posted in software by Christopher R. Wirz on Mon Aug 14 2017 Using reflection, it is possible to create a singleton for any class or call any method (it's a feature). Read More C SHARP REFLECTION HACK TO DETERMINE IMPLICIT DEFAULT CONSTRUCTOR VS. DECLARED CONSTRUCTOR Posted in software by Christopher R. Wirz on Mon Jul 24 2017 Using reflection, it is possible to determine if a given type has a specified constructor or an implicit constructor. Read More MANAGED C# BYTE ARRAYS TO UN-MANAGED C++ BYTE ARRAYS Posted in software by Christopher R. Wirz on Sat Jul 08 2017 Byte arrays are foundational in C#, but can be exchanged with native and re-usable C++ code. Read More FREE GOOGLE SITESEARCH WITH NODEJS Posted in software by Christopher R. Wirz on Wed Jun 28 2017 SiteSearch is expensive, but using a NodeJS server you can easily wrap a web request. Read More SHIMMER LIKE FACEBOOK IN SWIFT 3.0 Posted in software by Christopher R. Wirz on Tue Jun 06 2017 Adding a Shimmer effect to UIView through inspectable extensions. Read More CONDITIONAL FOREACH PERFORMANCE CONSIDERATIONS IN DOTNET (C#) Posted in software by Christopher R. Wirz on Sat Jun 03 2017 For large data sets, canceling an iteration may have performance implications that are important to consider. Read More FOREACH PERFORMANCE CONSIDERATIONS IN DOTNET (C#) Posted in software by Christopher R. Wirz on Fri Jun 02 2017 The method by which you iterate on collections may have performance implications. Arrays are faster than lists, but their enumerators are not. Read More C++ UNIT TESTING REDIRECTING STDOUT Posted in software by Christopher R. Wirz on Mon May 22 2017 Visual Studio allows for C++ unit tests, but there is a major catch when trying to debug. Fortunately, we can capture stdout printf statements. Read More A SIMPLE QUEUE FOR IOS SWIFT Posted in software by Christopher R. Wirz on Wed May 17 2017 Swift Foundation libraries do not come with a queue, but a custom queue can be powerful and easy to implement. Read More TIMEOUT DETECTION AND RECOVERY (TDR) SETTINGS TO SUPPORT AI/ML IN WINDOWS Posted in engineering by Christopher R. Wirz on Mon May 08 2017 One of the most common stability problems in AI/ML training occurs when a computer hangs, or when it appears to be completely frozen while, in reality it is still training. Read More UTF-8 SERIALIZATION AND BYTE ARRAYS IN C# Posted in software by Christopher R. Wirz on Wed Mar 08 2017 The preferred approach to serialization in C# is to use XmlSerializer. While extremely convenient, there are a few small draw-backs. Read More SERVING STATIC FILES WITH NODE JS Posted in software by Christopher R. Wirz on Mon Feb 13 2017 Node JS offers an advantage over other server types because you can elect to keep certain contents in the cache (in memory). This allows for faster transactions of static data as there are fewer read write operations to disk or database. Read More SET THEORY SYMBOLS Posted in engineering by Christopher R. Wirz on Wed Feb 08 2017 Set notation is an important convention in computer science. This cheat sheet is extremely useful. Read More TYPE STRINGS VS REFLECTION IN C# Posted in software by Christopher R. Wirz on Fri Feb 03 2017 Does reflection beat string comparison for type identification? Read More TYPE CHECKING WITH STRINGS IN C# Posted in software by Christopher R. Wirz on Thu Feb 02 2017 Does bookmarking your type using strings get you anything? Read More SERVING LEGAL DOCUMENTS FOR A COMPLAINT/CASE Posted in venture by Christopher R. Wirz on Wed Feb 01 2017 You must serve the defendant properly. If you do not, the court may dismiss your case. Throughout the case, you are required to make sure that all other parties are served with copies of almost any document filed in the case. Read More WEAK REFERENCE LISTS (WEAKLISTS) IN C# Posted in software by Christopher R. Wirz on Wed Dec 28 2016 WeakLists allow for a collection of class objects to self manage - or at least garbage collect regardless of inclusion in the WealkList. Read More MAKING AN ARGUMENT Posted in venture by Christopher R. Wirz on Tue Dec 13 2016 An argument is a set of two or more propositions related to each other in such a way that all but one of them (the premises) are supposed to provide support for the remaining one (the conclusion). When writing in long form, the structure may get lost. It is best to outline each element of the argument before hand. Read More BYTE ARRAY PASSWORDS IN C# Posted in software by Christopher R. Wirz on Tue Nov 08 2016 Byte arrays (byte[]) are preferred over strings for handling passwords and other sensitive data in memory over string object types. Read More EXPLICIT TO IMPLICIT CAST OPERATORS IN C# Posted in software by Christopher R. Wirz on Tue Oct 18 2016 Using a weak reference collection, explicit cast operators can function like implicit cast operators. Read More C# IMPLICIT CAST WRAPPING FOR OPERATORS Posted in software by Christopher R. Wirz on Wed Sep 28 2016 Extension methods must be in static classes, and static classes can't have operator overloads. Read More PARTIALLY AVAILABLE EXTENSION METHODS IN C# Posted in software by Christopher R. Wirz on Sun Sep 18 2016 Some C# 3 features can be used in .NET 2.0 with a declaration. Extension methods require an attribute which is normally part of .NET 3.5. Read More USING SYSTEM.THREADING.EVENTWAITHANDLE TO BLOCK FOR AN EVENT Posted in software by Christopher R. Wirz on Fri Sep 02 2016 A developer can still hook onto an event, but now can return a value from the added execution body within a client method. Read More MONKEY PATCH METHODS AND PROPERTIES IN JAVASCRIPT Posted in software by Christopher R. Wirz on Wed Aug 03 2016 Javascript allows for prototype methods, but define properties can take place on the prototype as well. Read More PROGRAMMATICALLY RUNNING UNIT TESTS IN C# Posted in software by Christopher R. Wirz on Tue Jun 28 2016 Running a test outside of MS Test allows for an application to have a Built-In-Test (BIT). Read More USING THE WINDOWS API TO SIMULATE KEYBOARD INPUT IN C# Posted in software by Christopher R. Wirz on Fri Apr 15 2016 Using the user32.dll library, C# can be used to simulate keystrokes. Read More USING THE WINDOWS API TO EMULATE HARDWARE INPUT IN C# Posted in software by Christopher R. Wirz on Wed Apr 13 2016 C# is managed code, but parts of the Windows API were built before the introduction of C#. Fortunately, there are InteropServices to call the API Read More BUILDING RESILIENCE Posted in management by Christopher R. Wirz on Fri Mar 18 2016 A leader can both manage stress and build self-confidence. Read More MODELING THE NEW NORM Posted in management by Christopher R. Wirz on Thu Mar 17 2016 Leaders embody the change they wish to see. Read More MANAGING A CHANGE Posted in management by Christopher R. Wirz on Wed Mar 16 2016 Managing a change-oriented project has many considerations for an organization to adopt a new norm. Read More DIVERSITY AND INCLUSION Posted in management by Christopher R. Wirz on Tue Mar 15 2016 Diversity and inclusion are dominant themes in the workplace. Research has shown they are associated with higher levels of performance. Read More DEVELOPING A LIEUTENANT Posted in management by Christopher R. Wirz on Mon Mar 14 2016 A second in command, a lieutenant, is a reliable collaborator and go to person. Don't try to do everything. Start developing a trusted lieutenant to assist you. Read More BASE64 FILE ENCODING USING JAVASCRIPT Posted in software by Christopher R. Wirz on Sun Mar 13 2016 Encoding file information into a base-64 URI can easily be done in javascript Read More UNDERSTANDING EVOLUTION Posted in management by Christopher R. Wirz on Sat Mar 12 2016 Your ability to move the team forward has a lot to do with your ability to look back at where they have been. Read More BASE64 ENCODED IMAGE URIS Posted in software by Christopher R. Wirz on Sat Mar 12 2016 Image data can be directly inserted into a HTML document using data URIs. This allows an entire HTML document to be loaded in a single request. Read More ASSERTING AUTHORITY Posted in management by Christopher R. Wirz on Fri Mar 11 2016 A leader uses authority to support team performance. Read More INCREASING AUTHENTICITY Posted in management by Christopher R. Wirz on Thu Mar 10 2016 Confidence and competence are good for leaders, but the best leaders are truly authentic. Read More SERVANT LEADERSHIP Posted in management by Christopher R. Wirz on Wed Mar 09 2016 Leadership is not about hierarchies and command and control. Read More MEMBERSHIP VS LEADERSHIP Posted in management by Christopher R. Wirz on Tue Mar 08 2016 Leading a team is a lot different than simply being on the team - which has its challenges and opportunities. Read More EXPLAINING THE DECISION-MAKING STYLE AND PROCESS Posted in management by Christopher R. Wirz on Mon Mar 07 2016 Decision-making frameworks can be categorized as autocratic, collaborative, or democratic. Decision making starts with understanding your style, explaining it to the team, using good explanations, and owning your decisions. Read More BUILDING RAPPORT Posted in management by Christopher R. Wirz on Sun Mar 06 2016 Great rapport is about comfortable and positive interactions that support the production of quality work. Read More FOCUS ON PURPOSE Posted in management by Christopher R. Wirz on Sat Mar 05 2016 Purpose is feeling that what you do matters. Read More EMBRACING FEEDBACK Posted in management by Christopher R. Wirz on Fri Mar 04 2016 An important function of successful communication as a leader is giving someone performance-related feedback. Read More PERFORMANCE EXPECTATIONS Posted in management by Christopher R. Wirz on Thu Mar 03 2016 How do you know what's expected of you? It's all about building rapport with your boss and your team. Read More COMMUNICATING EFFECTIVELY Posted in management by Christopher R. Wirz on Wed Mar 02 2016 When you are proactive with delivering messages, mindful of challenges and debates, using the right channels, and embracing candor more than civility, you will be successful as a communicator. Read More THE FOUR COMPONENTS OF A HIGH PERFORMANCE WORKING SYSTEM Posted in management by Christopher R. Wirz on Tue Mar 01 2016 A High Performance Work System is an environment that allows the employee to have greater involvement and responsibility - and has proven to produce a better product through a more effective team dynamic. Read More DATA CONTRACT TYPE DETECTION IN C# Posted in software by Christopher R. Wirz on Thu Feb 18 2016 Using different serialization paradigms, one single set of extension methods can handle them all. Read More STYLED GRIDSPLITTER HANDLES IN WPF Posted in software by Christopher R. Wirz on Sun Feb 14 2016 A styled grid splitter can be accomplished in a single style resource using Windows Presentation Foundation (WPF). Read More DESIGN DATA IN WPF Posted in software by Christopher R. Wirz on Sat Feb 13 2016 When creating a WPF application, laying out design is easy, but making it look good with data doesn't have to be hard. Read More VIEW MODELS AS A WPF DEPENDENCY PROPERTY Posted in software by Christopher R. Wirz on Wed Feb 10 2016 The DataContext of a user control is important for its interaction, but his can become even more dynamic when it is a dependency property. Read More SCRAPING WEB DATA WITH EXCEL [MACROS] Posted in software by Christopher R. Wirz on Wed Feb 03 2016 For simple cases, MS Excel macros can be used to make web requests - an even provide access to the Document Object Model (DOM). Read More FAIRNESS AND INTEGRITY Posted in management by Christopher R. Wirz on Tue Feb 02 2016 Fairness in the workplace is a strong way to demonstrate integrity. Read More AN INTRODUCTION TO OPERATIONS STRATEGY Posted in management by Christopher R. Wirz on Mon Feb 01 2016 Operations/Organizational strategy is critical to operations management success and make a business more competitive. Read More POINTERS REFERENCES AND BACK IN C++ Posted in software by Christopher R. Wirz on Thu Jan 28 2016 A C/C++ API can be written using pointers or references, since the conversion is loss-less. Read More PROTECTING FILES IN NODEJS Posted in software by Christopher R. Wirz on Thu Jan 21 2016 With NodeJS, you don't have htaccess, but there are other ways of protecting files. Read More RESETTING A 503-ED OPENSHIFT RUBY ON RAILS CONTAINER USING RHC Posted in software by Christopher R. Wirz on Wed Jan 13 2016 Due to a long standing bug with InnoDB in MySQL, disk space on the database container may be exhausted and it's time to attach a new container to your application. Read More INSTALLING REDMINE 3.0.1 ON OPENSHIFT Posted in software by Christopher R. Wirz on Wed Jan 13 2016 Redmine is a great tool for project management. While the source code is free, there are a limited number of options for hosting it affordably. Luckily, Openshift has a reasonable free tier that can support an instance of Redmine. Read More SOMETIMES YOU POINT TO NULL IN C/C++ Posted in software by Christopher R. Wirz on Mon Jan 11 2016 Sometimes you don't need to initialize a pointer when working with string arrays, you can set it to NULL. Read More KNOWING WHAT TO FOCUS ON Posted in management by Christopher R. Wirz on Wed Jan 06 2016 When managing a technical team, technical needs and desires and the requirements of managing a business can make the course of action unclear. Read More SUPPORTING FLEXIBLE WORK HABITS Posted in management by Christopher R. Wirz on Tue Jan 05 2016 Whatever you allow, ensure that you are even-handed, fair, and tied to the objectives of corporate standards. Read More LEADERSHIP ROLES FOR TECHNICAL TEAMS Posted in management by Christopher R. Wirz on Mon Jan 04 2016 Leaders of technical teams must focus on the business while their team focuses on technical detail. Read More CHALLENGES LEADING A TECHNICAL TEAM Posted in management by Christopher R. Wirz on Sun Jan 03 2016 A main goal of managing a technical team is to avoid creating frustration with the customer. This begins by getting to know your technical team members. Read More WHAT IS LEADERSHIP? Posted in management by Christopher R. Wirz on Sat Jan 02 2016 Leadership is a process more than it is a position. Read More C# PROPER TASK PASSING (ASYNC AWAIT) Posted in software by Christopher R. Wirz on Mon Dec 28 2015 The await keyword provides a non-blocking way to start a task, then continue execution when that task completes, but don't nest too many tasks. Read More RESULTS OF TASK CANCELLATION IN DOTNET (C#) Posted in software by Christopher R. Wirz on Tue Dec 22 2015 Task cancellation must be handled inside the task, but you can either interrupt the task with a throw or exit gracefully, completing the task. Read More PROPER TASK CANCELLATION IN DOTNET (C#) Posted in software by Christopher R. Wirz on Sun Dec 20 2015 The delegate of a task should utilize the cancellation token in order to be effective. Read More FUTURE-PROOFING ACCESS CONNECTION CLASSES Posted in software by Christopher R. Wirz on Sat Dec 12 2015 MS Access has changed its API over the years, and it's time to future-proof your connection classes. Read More POLYMORPHIC COLLECTION SERIALIZATION IN C# Posted in software by Christopher R. Wirz on Wed Nov 04 2015 XmlSerializer cannot serialize interfaces, yet SOLID principles implies that one should code to interfaces, not concrete types. Read More WPF SEPARATE STYLE RESOURCE Posted in software by Christopher R. Wirz on Wed Oct 14 2015 The resource dictionary can combine multiple resource dictionaries through the MergedDictionaries declaration. Read More DEFINE PROPERTIES IN JAVASCRIPT Posted in software by Christopher R. Wirz on Tue Oct 13 2015 Javascript allows for defining properties in many ways, including set and get logic. Read More COCLASS SERIALIZATION IN C# Posted in software by Christopher R. Wirz on Thu Oct 08 2015 Abstract classes and Interfaces serve different purposes, but neither allows for instantiation. Read More CONFIGURATIONMANAGER DEFAULT VALUES IN C# Posted in software by Christopher R. Wirz on Mon Sep 14 2015 System.Configuration.ConfigurationManager.ConnectionStrings is a ConnectionStringSettingsCollection populated by the App.config. But, what if you don't want to share that file. Read More HAND WRITTEN ENTITY IN C# Posted in software by Christopher R. Wirz on Sun Sep 13 2015 Entity is an object-relational mapper that allows your code to work the same regardless of the database back end - but you don't need the designer to get started. Read More CREATING TRIGGERS IN MICROSOFT SQL Posted in software by Christopher R. Wirz on Fri Aug 14 2015 If using MS SQL Server, this is how to setup a trigger. Read More MATERIALIZED VIEWS IN MYSQL Posted in software by Christopher R. Wirz on Thu Aug 13 2015 Forget expensive join operations. Your MySQL database needs to call materialized views. Read More GETTING TO THE ROOT IN SERIALIZATION USING C# Posted in software by Christopher R. Wirz on Thu Jul 30 2015 C# code generated from a schema is going to have many custom attributes. Sometimes, these attributes modify the behavior of serialization. Read More PROGRAMMATIC BINDING TO PRESENTATION CONTROLS IN C# Posted in software by Christopher R. Wirz on Tue Jun 30 2015 Programmatic binding offers a slight advantage over XAML in that it will check the property names at compile time. Read More RELAY COMMANDS FOR PROCESS EXECUTION IN C# Posted in software by Christopher R. Wirz on Wed Apr 08 2015 Windows Presentation Foundation (WPF) controls have both an IsEnabled boolean property and a Click RoutedEventHandler which can be consolidated in the Command ICommand property. Read More EXPRESSION BODIED MEMBERS IN C# Posted in software by Christopher R. Wirz on Tue Jan 13 2015 Expression bodied members are a feature of C# 6.0 and provide an inline expression for properties (get only properties) and methods. Read More MISSING A CRITICAL MILESTONE Posted in management by Christopher R. Wirz on Sun Jan 04 2015 When discovered that a critical milestone will be missed and schedule suffers, the team must act accordingly in a timely manner. Read More CREATING SSL CERTIFICATES FOR RED-HAT Posted in software by Christopher R. Wirz on Sat Jan 03 2015 These steps will help create an SSL certificate quickly for your server. Once complete, your website will support HTTPS. Read More RENAMING A DATABASE IN MONGODB Posted in software by Christopher R. Wirz on Wed Oct 15 2014 Renaming a database should be done with caution - and backups are advised before performing any database operations. Read More PRETTY XML IN C# Posted in software by Christopher R. Wirz on Mon Aug 04 2014 XML serialization is a common technique for storing and transacting data objects when programming in C# but sometimes it is hard to understand the data hierarchy. Read More AUTOMATIC SWIFT SDK UPDATES IN MAC OS Posted in software by Christopher R. Wirz on Mon Jun 16 2014 Mac OS provides a scripting environment within the terminal to automate tasks such as downloading the latest SDK and updating it Read More FREE SSL OPTIONS Posted in software by Christopher R. Wirz on Sun May 11 2014 Having SSL enabled on your website helps with Search Engine Optimization, is recommended for membership, and is required to process financial transactions. Read More A COMMON USING STATEMENT MISTAKE IN C# Posted in software by Christopher R. Wirz on Tue Feb 18 2014 Do not use code cleanup on using statements where writers are involved. Read More FLAVORS OF AGILE Posted in management by Christopher R. Wirz on Fri Feb 14 2014 The term agile became popular around 2000, but has roots throughout the 1900s. Read More BASIC CONFIGURATION MANAGEMENT Posted in management by Christopher R. Wirz on Thu Jan 02 2014 A robust CM approach helps in the product lifecycle throughout development, operation and maintenance phases. Read More USING SYSTEM.THREADING.TASK TO CALL A REMOTE BROADCAST SERVICE Posted in software by Christopher R. Wirz on Fri Sep 13 2013 If a broker is over-loaded, it will be slow - but in most cases, remote services are executed in environments with more resources than local clients. Read More A GENERIC-FRIENDLY PLUGIN FRAMEWORK IN C# Posted in software by Christopher R. Wirz on Mon May 13 2013 The goal of a PlugIn framework is to allow library files (DLLs) to be placed in a given given directory and become available to the main application. Read More COMMON COLLECTIONS EXPLAINED Posted in software by Christopher R. Wirz on Fri Apr 12 2013 There are many collection types in Java. Knowing which to use when can have several implications. Read More POSITION BASED MOUSE-OVER IN C# Posted in software by Christopher R. Wirz on Thu Mar 28 2013 The user32 API and an extension method can be used to detect mouse position over a control. Read More ETC/HOSTS AND AD BLOCKING Posted in software by Christopher R. Wirz on Thu Feb 28 2013 The internet host table specification is available in all operating systems. You can use it for ad blocking. Read More FILTER AND SORT IN JAVASCRIPT Posted in software by Christopher R. Wirz on Fri Aug 03 2012 Javascript allows for filtering and sorting of arrays. Read More BUILDING A MENTORSHIP TREE FROM A SORTED ARRAY Posted in youfolio-interview-questions by Christopher R. Wirz on Sun Jul 22 2012 Given an ordered collection, build a tree with the lowest value at the top left position. Read More LEFT, MIDDLE, RIGHT ITERATOR Posted in youfolio-interview-questions by Christopher R. Wirz on Fri Jul 20 2012 Iterators let you chain operations without nesting loops - meaning you can keep O(n) complexity for streaming data sets. Read More MAKING A HASHMAP OF LINKEDLISTS Posted in youfolio-interview-questions by Christopher R. Wirz on Thu Jul 19 2012 YouFolio's content must horizontally scale. Can you find an efficient means to distribute the values based on keys? Read More FINDING ACCOUNTS THROUGH INTERVAL HALVING Posted in youfolio-interview-questions by Christopher R. Wirz on Wed Jul 18 2012 YouFolio's accounts are kept in order, but sharded by range. Can you find an item within the range? Read More ARRAY ROTATION WITH PYTHON Posted in youfolio-interview-questions by Christopher R. Wirz on Tue Jul 17 2012 Changing the position of elements in large collections takes specical considerations where only the stack can be used. Read More MAPPING NETWORK DRIVES AT THE COMMAND LINE - UBUNTU VS WINDOWS Posted in software by Christopher R. Wirz on Sun Apr 15 2012 Shared network folders provides interoperability between Linux and Windows, and mapping from each is equally easy. Read More MICROSOFT PROJECT - CONVERT ALL SUBTASKS TO AUTOMATIC SCHEDULING USING MACROS Posted in software by Christopher R. Wirz on Sat Apr 07 2012 To transition from waterfall project management to kanban, schedule must be derived from work and not the other way around. Read More TRIMMING STRINGS IN C++ Posted in software by Christopher R. Wirz on Mon Apr 02 2012 C++ doesn't include a trim() method for std::string, but making one is easy. Read More ADDING SUBTRACT TO LINQ Posted in software by Christopher R. Wirz on Thu Mar 22 2012 Linq allows for interaction with collections of objects, but lacks a way to remove elements based on a given criteria. Read More ADDING INDEXOF TO LINQ Posted in software by Christopher R. Wirz on Thu Mar 15 2012 Linq allows for interaction with collections of objects, but is missing the IndexOf feature. Read More CALLING C# FROM EXCEL USING COM Posted in software by Christopher R. Wirz on Sat Mar 03 2012 You don't have to go the distance to make an excel AddIn, just register for COM to expose all the functionality you need. Read More NUMERIC TYPE DETECTION IN C# Posted in software by Christopher R. Wirz on Sat Mar 03 2012 C#'s Type object does not have an IsNumeric method or property. This is how to make one using extension methods. Read More THE USING STATEMENT AND MEMBERS Posted in software by Christopher R. Wirz on Sat Feb 18 2012 Do not use the using statement on class members if you can avoid it. Read More ADDING PROPERTIES TO C++ 11 LIKE C# Posted in software by Christopher R. Wirz on Thu Feb 02 2012 C++ doesn't come with properties, but there are ways to add them Read More C++ MATRIX STRUCTURE AND ACCESS PATTERN CONSIDERATIONS Posted in software by Christopher R. Wirz on Wed Jan 25 2012 There are many ways to define a Matrix in C++, but maybe it makes more sense to do it one row at a time. Read More READING RSS WITH JQUERY Posted in software by Christopher R. Wirz on Sun Aug 14 2011 Really Simple Syndication (RSS) is xml that can be easily read using jQuery. Read More LINQ DISTINCT CLASSES IN C# Posted in software by Christopher R. Wirz on Wed Aug 10 2011 Distinct() returns distinct elements from a sequence using the default equality comparer to compare values - preferably the methods of the IEquatable interface. Read More LINQ CASTING ISSUES IN C# Posted in software by Christopher R. Wirz on Thu Aug 04 2011 Cast and OfType are two methods provided by Linq - however their behaviors are significantly different. Read More A COMMON BUG IN C# WHEN USING INHERITANCE AND CONSTRUCTOR BODIES Posted in software by Christopher R. Wirz on Wed Jun 29 2011 C# adds some modern flair with the ability to have inline constructor chains as well as constructor bodies and optional parameters. Read More A LITTLE ABOUT APIS (WHY THIS SITE HAS NONE) Posted in software by Christopher R. Wirz on Fri Jun 24 2011 Were you expecting an API here? This site is written Node JS so that content is in memory!. Read More AIR DATA CALCULATIONS Posted in engineering by Christopher R. Wirz on Sat Jun 11 2011 Calculate ISA values for standard day in browser using javascript. Standard day calculations are based on the air column theory to determine atmospheric conditions at a given altitude. Read More LOAN CALCULATOR Posted in venture by Christopher R. Wirz on Thu Aug 13 2009 Calculate amortization of a loan with the ability to solve for Principal At Beginning, Percent Interest Per Period, Payment per Period, or Number of Periods Read More CONSIDERATIONS IN CALLING .BAT FILES FROM .BAT FILES Posted in software by Christopher R. Wirz on Sun Aug 03 2008 Batch files (.bat) can be used for automated tasks or running programs with no user interface. Read More FEED FORWARD GRADIENT DESCENT USING MATRIX MATH Posted in engineering by Christopher R. Wirz on Wed Jun 18 2008 Feed forward neural networks can be represented by matrix math and can use analytical gradient descent. Read More WEIGHTED LEAST SQUARES AND THE PSEUDO-INVERSE Posted in engineering by Christopher R. Wirz on Mon May 19 2008 While least squares does not give precedence to the error on certain measurements, the weighted least squares can. Read More LEAST SQUARES AND THE PSEUDO-INVERSE Posted in engineering by Christopher R. Wirz on Sun May 18 2008 The least squares problem has an analytical solution - achieving a feasible solution when minimized. Read More ORTHOGONAL BASIS FUNCTIONS IN MATLAB Posted in engineering by Christopher R. Wirz on Tue Apr 08 2008 Gram-Schmidt orthogonalization takes a nonorthogonal set of linearly independent functions and constructs an orthogonal basis over an arbitrary interval Read More -------------------------------------------------------------------------------- Opinions and information expressed are solely that of the author and do not reflect that of any company, university or other collective entity. Copyright © 2022 • All Rights Reserved Bitcoin: 1jQYQPHhtMCGdcqV98iJrpc7eEm5zrXJo Ethereum: 0xB4abbF1DB3Cf4317756AF22b38B2B1cf06d7C894 Litecoin: LN76o3xb1qCg6sjPrTdyvbnSs5c48yqFhv