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Check if object value exists within a Javascript array of objects and if not add a new object to arr

... Here is an ES6 method chain using .map() and .includes(): const arr = [ { id: 1, username: 'fred' }, { id: 2, username: 'bill' }, { id: 2, username: 'ted' } ] const checkForUser = (newUsername) => { arr.map(user => { return user.username }).in...
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Implementing MVC with Windows Forms

...different from each other. Some of the design differences I have seen are (including most combinations): Directly talk to the database (2 tier) Use a backend that has been written for the given application (3 tier) Use a set of web services that were written for use by many applications and can’...
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Unable to load DLL 'SQLite.Interop.dll'

..., this was in the NON-WORKING version: <ItemGroup> <Content Include="x64\SQLite.Interop.dll" /> <Content Include="x86\SQLite.Interop.dll" /> </ItemGroup> And this is what the WORKING version had: <ItemGroup> <Content Include="x64\SQLite.Interop.dll...
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What is a .h.gch file?

...identally, remove any *.gch files Never, ever, ever put a .cpp file in an #include statement. If rule one is broken, at some point the problem described in the question will occur. If rule two is broken, at some point the linker will complain about multiply-defined symbols. ...
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git undo all uncommitted or unsaved changes

...ain: git clean -fdx WARNING: -x will also remove all ignored files, including ones specified by .gitignore! You may want to use -n for preview of files to be deleted. To sum it up: executing commands below is basically equivalent to fresh git clone from original source (but it does not r...
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Using -performSelector: vs. just calling the method

...mpile the code. One key difference is that -performSelector: and friends (including the multi-threaded and delayed variants) are somewhat limited in that they are designed for use with methods with 0-2 parameters. For example, calling -outlineView:toolTipForCell:rect:tableColumn:item:mouseLocation:...
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Where can I download IntelliJ IDEA Color Schemes? [closed]

... nice! would be good to include instructions on how to install it in the homepage, I think – Vic Aug 22 '18 at 18:21 ...
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Is it possible to make an ASP.NET MVC route based on a subdomain?

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Downloading Java JDK on Linux via wget is shown license page instead

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What is the relative performance difference of if/else versus switch statement in Java?

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