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How to grep (search) committed code in the Git history

...s and the like), you need to do: git grep <regexp> $(git rev-list --all) git rev-list --all | xargs git grep <expression> will work if you run into an "Argument list too long" error. If you want to limit the search to some subtree (for instance, "lib/util"), you will need to pass tha...
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How do I get the application exit code from a Windows command line?

...cial syntax: if errorlevel See if /? for details. Example @echo off my_nify_exe.exe if errorlevel 1 ( echo Failure Reason Given is %errorlevel% exit /b %errorlevel% ) Warning: If you set an environment variable name errorlevel, %errorlevel% will return that value and not the exit code. ...
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Suggestions for debugging print stylesheets?

...; Rendering Settings > Emulate media > print – allicarn Jul 7 '16 at 22:22 ...
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Understanding the Use of ColorMatrix and ColorMatrixColorFilter to Modify a Drawable's Hue

...working on a UI for an app, and I'm attempting to use grayscale icons, and allow the user to change the theme to a color of their choosing. To do this, I'm trying to just apply a ColorFilter of some sort to overlay a color on top of the drawable. I've tried using PorterDuff.Mode.MULTIPLY, and it wor...
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Entity Framework Refresh context?

...in your context is to dispose your context and create a new one. If you really need to refresh some entity and you are using Code First approach with DbContext class, you can use public static void ReloadEntity<TEntity>( this DbContext context, TEntity entity) wh...
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Play audio file from the assets directory

...e file in the assets directory. The asset directory contents are not actually 'real files' on disk. All of them are put together one after another. So, if you do not specify where to start and how many bytes to read, the player will read up to the end (that is, will keep playing all the file...
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structure vs class in swift language

... @MichaelRapadas Numbers actually are structs in Swift. – Nikolai Ruhe Sep 16 '14 at 9:05 ...
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How can I count occurrences with groupBy?

...answered Jun 5 '17 at 21:37 user_3380739user_3380739 1,33999 silver badges1111 bronze badges ...
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When should I use semicolons in SQL Server?

... Seems they're basically encouraging use of the semicolon in general, by requiring it before all new statement types that have been introduced in recent years. (MERGE too for example). As mentioned in other answers, in the ANSI standard they a...
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What are the basic rules and idioms for operator overloading?

...::ios::failbit); return is; } When implementing operator>>, manually setting the stream’s state is only necessary when the reading itself succeeded, but the result is not what would be expected. Function call operator The function call operator, used to create function objects, also k...