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Python: reload component Y imported with 'from X import Y'?
...nce I have imported a module X in an interpreter session using import X , and the module changes on the outside, I can reload the module with reload(X) . The changes then become available in my interpreter session.
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Python != operation vs “is not”
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== is an equality test. It checks whether the right hand side and the left hand side are equal objects (according to their __eq__ or __cmp__ methods.)
is is an identity test. It checks whether the right hand side and the left hand side are the very same object. No methodcalls ...
How to use Namespaces in Swift?
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The link to the Apple dev forums is now broken, and Apple has not imported that thread into the new forums.developer.apple.com forums site, unfortunately.
– Dai
Feb 15 '17 at 2:07
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How to determine day of week by passing specific date?
...DateFormat("dd/M/yyyy").parse(dateString)
you can use joda-time's DateTime and call dateTime.dayOfWeek() and/or DateTimeFormat.
edit: since Java 8 you can now use java.time package instead of joda-time
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In javascript, is an empty string always false as a boolean?
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Yes. Javascript is a dialect of ECMAScript, and ECMAScript language specification clearly defines this behavior:
ToBoolean
The result is false if the argument is the empty String (its length is zero);
otherwise the result is true
Quote taken from http://www.ecma-inte...
bash: mkvirtualenv: command not found
...erage the chance that virtualenvwrapper.sh is already in your shell's PATH and just issue a source `which virtualenvwrapper.sh`
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PDO support for multiple queries (PDO_MYSQL, PDO_MYSQLND)
...rt multiple queries getting executed in one statement. I've been Googleing and found few posts talking about PDO_MYSQL and PDO_MYSQLND.
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How can I create an Asynchronous function in Javascript?
...iscussing this with a friend yesterday so this answer is perfect! I understand and can identify the async functions and use them in JS properly. But simply why can't we implement custom ones is not clear to me. It's like a black box that we know how make it work (using, say, setInterval) but that we...
What is the difference between user variables and system variables?
What is the difference between user variables such as PATH , TMP , etc. and system variables?
5 Answers
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Global and local variables in R
I am a newbie for R, and I am quite confused with the usage of local and global variables in R.
3 Answers
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