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How can I determine if a JavaScript variable is defined in a page? [duplicate]

... answered Oct 8 '10 at 12:46 Sébastien Grosjean - ZenCocoonSébastien Grosjean - ZenCocoon 1,9111919 silver badges2727 bronze badges ...
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Why does Javascript's regex.exec() not always return the same value? [duplicate]

In the Chrome or Firebug console: 3 Answers 3 ...
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How would Git handle a SHA-1 collision on a blob?

...ations. This took the equivalent processing power as 6,500 years of single-CPU computations and 110 years of single-GPU computations. b/ would forge one file (with the same SHA1), but with the additional constraint its content and size would produce the identical SHA1 (a collision on the content al...
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Why doesn't JavaScript support multithreading?

...he internal mechanism (aka callback/promise/async-await) if you need to do CPU bound ops, then use worker threads. Worker threads are intended to be long-living threads, meaning you spawn a background thread and then you communicate with it via message passing. Otherwise, if you need to execute a...
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How can I generate Unix timestamps?

...t included in the UNIX timestamp in some systems? – Léo Léopold Hertz 준영 Jan 29 '16 at 11:02 ...
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How to drop columns by name in a data frame

... Jul 22 '13 at 20:06 Antoine LizéeAntoine Lizée 3,26311 gold badge2323 silver badges3131 bronze badges ...
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How to get file creation & modification date/times in Python?

...: Fri Jan 31 11:08:13 2020 on Linux Ubuntu 16.04! – Färid Alijani Jan 31 at 9:12 ...
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Visual Studio 2012 Express is suddenly “incompatible with this version of Windows”?

... @RenniePet, current VS 2012 Update is number 5. – Frédéric Nov 27 '15 at 18:02 add a comment  |  ...
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selecting unique values from a column

... answered Dec 20 '11 at 7:10 Léon RodenburgLéon Rodenburg 4,82411 gold badge1515 silver badges1717 bronze badges ...
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json_encode sparse PHP array as JSON array, not JSON object

...red Jun 25 '12 at 19:13 Boris GuéryBoris Guéry 44.6k66 gold badges4444 silver badges8282 bronze badges ...