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How to get the difference between two arrays in JavaScript?

... May I know what will happen when var a1 = ['a', 'b']; and var a2 = ['a', 'b', 'c', 'd', 'b'];, it will return wrong answer, i.e. ['c', 'd', 'b'] instead of ['c', 'd']. – skbly7 Oct 11 '15 at 23...
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What are naming conventions for MongoDB?

...fficial documentation mentions you may use underscores, also built-in identifier is named _id (but this may be be to indicate that _id is intended to be private, internal, never displayed or edited. share | ...
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How to set java_home on Windows 7?

...swered Jun 11 '10 at 17:04 fogedifogedi 1,84522 gold badges1313 silver badges1616 bronze badges ...
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What's the “average” requests per second for a production web application?

... @user :-D Yes, it's pretty much historical now. It was a useful answer for me at the time, though! :-) – Peter K. Sep 14 '17 at 10:59 add a com...
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What is your preferred style for naming variables in R? [closed]

...ead comments to this effect on one of the R list: dots are a historical artifact and no longer encouraged; so we have a clear winner still standing in the last round: camelCase. I am also not sure if I really agree with the assertion of 'lacking precendent in the R community'. And yes: pragmatis...
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Passing parameters to addTarget:action:forControlEvents

...clear what exactly you try to do, but considering you want to assign a specific details index to each button you can do the following: set a tag property to each button equal to required index in switchToNewsDetails: method you can obtain that index and open appropriate deatails: - (void)switchTo...
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“java.lang.OutOfMemoryError: PermGen space” in Maven build [duplicate]

...Windows:) set MAVEN_OPTS=-Xmx512m -XX:MaxPermSize=128m You can also specify these JVM options in each maven project separately. share | improve this answer | follow ...
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Why does the MongoDB Java driver use a random number generator in a conditional?

...gan's laws it is a trivial observation that this piece of code amounts to if (!_ok && Math.random() <= 0.1) return res; The commit that originally introduced this logic had if (_ok == true) { _logger.log( Level.WARNING , "Server seen down: " + _addr, e ); } else if (Math.random() &...
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Converting from IEnumerable to List [duplicate]

... I wonder if Microsoft changed this. I just tried this very example, and there is no ToList() method in IEnumerable. Using VS 2015 and .NET 4.6.1 . – James Dec 22 '16 at 20:20 ...
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Ideal Ruby project structure

I'm after an overview/clarification of the ideal project structure for a ruby (non-rails/merb/etc) project. I'm guessing it follows ...