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What is the difference between single-quoted and double-quoted strings in PHP?

...llows is enclosed in single quotes, e.g. <<<'EOT'. No parsing is done in nowdoc. Notes: Single quotes inside of single quotes and double quotes inside of double quotes must be escaped: $string = 'He said "What\'s up?"'; $string = "He said \"What's up?\""; Speed: I would not put too muc...
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How can I get a side-by-side diff when I do “git diff”?

...splay the diff in an interactive diff tool like "kdiff3". How can this be done? 16 Answers ...
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Suppress echo of command invocation in makefile?

... write the output to a file, which has a SHA1 fingerprint identical to the one given in the spec. 4 Answers ...
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How to access cookies in AngularJS?

... This answer has been updated to reflect latest stable angularjs version. One important note is that $cookieStore is a thin wrapper surrounding $cookies. They are pretty much the same in that they only work with session cookies. Although, this answers the original question, there are other solution...
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Naming of enums in Java: Singular or Plural?

.... The thinking is that you're not selecting multiple Protocols, but rather one Protocol of the possible choices in the list of values. Note the absence of plurals: http://docs.oracle.com/javase/tutorial/java/javaOO/enum.html ...
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Variable declaration placement in C

... Just to be pedantic, the erroneous declaration should be at least notified according to the C standard. So it should be an error or a warning in gcc. That is, don't trust that a program can be compile to mean that it is compliant. –...
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What does |= (ior) do in Python?

...d between dictionaries. Note: these are not the same as set operators mentioned above. Given operations between two assigned dicts d1 and d2: >>> d1 = d1 | d2 # 1 >>> d1 |= d2 # 2 where d1 is e...
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Key hash for Android-Facebook app

...oid SDK, and I got the readme.md (text file) in there, in which it is mentioned to generate the key hash for Android. How do I generate it? ...
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What is an IndexOutOfRangeException / ArgumentOutOfRangeException and how do I fix it?

...'re dataset has only two columns but you're trying to get a value from 3rd one (indices are always 0-based). Please note that this behavior is shared with most IDataReader implementations (SqlDataReader, OleDbDataReader and so on). You can get the same exception also if you use the IDataReader ...
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Asp.net MVC ModelState.Clear

Can anyone give me a succinct definition of the role of ModelState in Asp.net MVC (or a link to one). In particular I need to know in what situations it is necessary or desirable to call ModelState.Clear() . ...