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Build error: You must add a reference to System.Runtime

...that looks like this by default: <compilation debug="true" targetFramework="4.5"/> Once expanded I then added the following new configuration XML as I was instructed: <assemblies> <add assembly="System.Runtime, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11...
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Diff output from two programs without temporary files

... One drawback to be aware of is that if ./a or ./b fails, the caller will not find that out. – Alexander Pogrebnyak Sep 26 '10 at 23:19 5 ...
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How can I create a two dimensional array in JavaScript?

... @AndersonGreen It's a good thing you mentioned a link for those interested in multi-D array solution, but the question and Ballsacian1's answer are about "2D" array, not "multi-D" array – evilReiko Jun 14 '14 at 9:56 ...
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overlay two images in android to set an imageview

...of two choices: You can either define it in XML then simply set the image, or you can configure a LayerDrawable dynamically in code. Solution #1 (via XML): Create a new Drawable XML file, let's call it layer.xml: <layer-list xmlns:android="http://schemas.android.com/apk/res/android"> &l...
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Create list of single item repeated N times

... You can also write: [e] * n You should note that if e is for example an empty list you get a list with n references to the same list, not n independent empty lists. Performance testing At first glance it seems that repeat is the fastest way to create a list with n identical eleme...
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Django-DB-Migrations: cannot ALTER TABLE because it has pending trigger events

... Another reason for this maybe because you try to set a column to NOT NULL when it actually already has NULL values. share | improve this an...
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Javascript: negative lookbehind equivalent?

...€8.47".match(/(?<!\$)\d+(?:\.\d*)/) // Matches "8.47" ); Platform support: ✔️ V8 ✔️ Google Chrome 62.0 ✔️ Microsoft Edge 79.0 ✔️ Node.js 6.0 behind a flag and 9.0 without a flag ✔️ Deno (all versions) ✔️ SpiderMonkey ✔️ Mozilla Firefox 78.0 ????️ Ja...
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Can a CSV file have a comment?

Is there any official way to allow a CSV formatted file to allow comments, either on its own line OR at the end of a line? ...
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Rails: around_* callbacks

I have read the documentation at http://api.rubyonrails.org/classes/ActiveRecord/Callbacks.html , but don't understand when the around_* callbacks are triggered in relation to before_* and after_* . ...
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What command opens Ruby's REPL?

... There are several REPLs for Ruby. The standard library ships with a REPL called IRb (for Interactive Ruby), which installs a program named irb, but since it is just a Ruby library, it can also be invoked from Ruby code and not just from the shell. O...