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What does -D_XOPEN_SOURCE do/mean?

... the gcc man page, but did not find this specific option. I did find XOPEN_SOURCE , but there was little explanation of what it does. ...
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How do I count a JavaScript object's attributes? [duplicate]

... Use underscore library, very useful: _.keys(obj).length. share | improve this answer | follow | ...
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Is there a setting on Google Analytics to suppress use of cookies for users who have not yet given c

...ve defined elsewhere window['ga-disable-UA-XXXXXX-Y'] = true; } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'UA-XXXXXXX-Y']); _gaq.push(['_trackPageview']); function onOptIn(){ //have this run when/if they opt-in. window['ga-disable-UA-XXXXXX-Y'] = false; //...snip......
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How to use Elasticsearch with MongoDB?

...abase through the mongo shell and push some dummy data into it. mongo YOUR_DATABASE_NAME db.createCollection(YOUR_COLLECTION_NAME) for (var i = 1; i <= 25; i++) db.YOUR_COLLECTION_NAME.insert( { x : i } ) Now to Convert the standalone MongoDB into a Replica Set. First Shutdown the process. m...
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Error handling in Bash

...up() { rm -f "${tempfiles[@]}" } trap cleanup 0 error() { local parent_lineno="$1" local message="$2" local code="${3:-1}" if [[ -n "$message" ]] ; then echo "Error on or near line ${parent_lineno}: ${message}; exiting with status ${code}" else echo "Error on or near line ${pare...
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Writing your own STL Container

...seudo-container I pieced together from § 23.2.1\4 Note that the iterator_category should be one of std::input_iterator_tag, std::output_iterator_tag,std::forward_iterator_tag,std::bidirectional_iterator_tag,std::random_access_iterator_tag. Also note that the below is technically more strict than ...
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Trying to mock datetime.date.today(), but not working

...ock.patch('datetime.date.today') def test(): datetime.date.today.return_value = date(2010, 1, 1) print datetime.date.today() Unfortunately, this won't work: >>> test() Traceback (most recent call last): File "<stdin>", line 1, in <module> File "build/bdist.macosx-...
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Creating a new dictionary in Python

... Call dict with no parameters new_dict = dict() or simply write new_dict = {} share | improve this answer | follow ...
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How do I mock a service that returns promise in AngularJS Jasmine unit test?

...ce; beforeEach(module('app.myService')); beforeEach(inject( function(_myService_, myOtherService, $q){ myService = _myService_; spyOn(myOtherService, "makeRemoteCallReturningPromise").and.callFake(function() { var deferred = $q.defer(); deferred.resolve('Remote call res...
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Read file from line 2 or skip header row

... Or use header_line = next(f). – Samuel Jan 6 '15 at 23:41 add a comment  |  ...