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How to swap keys and values in a hash
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Omg. i didnt know you could do |(key,value),out|. That so awesome, I hated that array coming in there instead of key and value. Thanks so much
– Iuri G.
Jun 13 '14 at 17:03
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What is a message pump?
...call, that would cause horrible re-entrancy problems. A thread should be "idle", not busy executing any code that is mutating the state of the program.
Perhaps you can see where that leads: yes, when a program is executing the message loop, it is idle. The actual marshaling takes place through ...
Does Python support multithreading? Can it speed up execution time?
.... Maybe you or someone could write a new answer that I can accept that provides some specific examples of common modules/codes/operations where threading will be allowed by the GIL to run paralell and thus faster (eg examples of those I/O and network/socket read operations that have been mentioned, ...
XPath to select multiple tags
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That is super. Where did you come up with that?
– Keith Tyler
Jan 10 '19 at 2:42
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When serving JavaScript files, is it better to use the application/javascript or application/x-javas
.../javascript is obsolete
application/x-javascript was experimental while deciding to move to…
application/javascript is the current official MIME type for JS
That said, browsers often ignore the content-type sent by the server and pay a lot of attention to the type attribute (and some may not yet...
How do I write good/correct package __init__.py files
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__all__ is very good - it helps guide import statements without automatically importing modules
http://docs.python.org/tutorial/modules.html#importing-from-a-package
using __all__ and import * is redundant, only __all__ is needed
I think one of the most pow...
What's the fastest way to loop through an array in JavaScript?
...swered Aug 31 '11 at 3:00
jondavidjohnjondavidjohn
57.9k2121 gold badges108108 silver badges150150 bronze badges
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Can a Windows batch file determine its own file name?
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p -- path
n -- file name
x -- extension
f -- full path
E.g., from inside c:\tmp\foo.bat, %~nx0 gives you "foo.bat", whilst %~dpnx0 gives "c:\tmp\foo.bat". Note the pieces are always assembled in canonical order, so if you get cute and try %~xnpd0, you still get "c:\tmp\foo.bat"
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Why is arr = [] faster than arr = new Array?
...ed:
[]: ARRAY_INIT
[1]: ARRAY_INIT (NUMBER)
[1, foo]: ARRAY_INIT (NUMBER, IDENTIFIER)
new Array: NEW, IDENTIFIER
new Array(): NEW, IDENTIFIER, CALL
new Array(5): NEW, IDENTIFIER, CALL (NUMBER)
new Array(5,4): NEW, IDENTIFIER, CALL (NUMBER, NUMBER)
new Array(5, foo): NEW, IDENTIFIER, CALL (NUMBER, I...
Convert blob URL to normal URL
... If blob urls don't point to server data, then how come Youtube videos' src url look like: src="blob:https%3A//www.youtube.com/44f26667-03f1-4978-9eed-af0cbf11dd67" (in Chrome)
– bhh1988
Sep 3 '14 at 15:53
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