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.

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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.

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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.

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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.

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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.

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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.

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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.

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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?

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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).

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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

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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.

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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.

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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.

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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).

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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.

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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

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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.

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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.

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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.

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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++.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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).

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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.

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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

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Building Resilience

Posted in management by Christopher R. Wirz on Fri Mar 18 2016

A leader can both manage stress and build self-confidence.

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Modeling the new Norm

Posted in management by Christopher R. Wirz on Thu Mar 17 2016

Leaders embody the change they wish to see.

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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.

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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.

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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.

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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

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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.

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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.

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Asserting Authority

Posted in management by Christopher R. Wirz on Fri Mar 11 2016

A leader uses authority to support team performance.

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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.

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Servant Leadership

Posted in management by Christopher R. Wirz on Wed Mar 09 2016

Leadership is not about hierarchies and command and control.

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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.

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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.

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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.

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Focus on Purpose

Posted in management by Christopher R. Wirz on Sat Mar 05 2016

Purpose is feeling that what you do matters.

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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.

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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.

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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.

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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.

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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.

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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).

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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.

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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.

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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).

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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

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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.

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A common using statement mistake in C#

Posted in software by Christopher R. Wirz on Tue Feb 18 2014

Do not used code cleanup on using statements where writers are involved.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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!.

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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.

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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

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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.

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