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What are the advantages of using nullptr?
...d, since it catches only calls with nullptr, not with a null pointer of a different type, like (void*)0. But I can believe it has some uses, even if all it does is save you defining a single-valued place-holder type of your own to mean "none".
– Steve Jessop
De...
Get the position of a div/span tag
...e top & left position of a div or span element when one is not specified?
6 Answers
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How to enable or disable an anchor using jQuery?
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To prevent an anchor from following the specified href, I would suggest using preventDefault():
// jQuery 1.7+
$(function () {
$('a.something').on("click", function (e) {
e.preventDefault();
});
});
// jQuery < 1.7
$(function () {
$('a.somethin...
How do I create a dynamic key to be added to a JavaScript object variable [duplicate]
...ript, all arrays are objects, but not all objects are arrays. The primary difference (and one that's pretty hard to mimic with straight JavaScript and plain objects) is that array instances maintain the length property so that it reflects one plus the numeric value of the property whose name is nume...
Get a filtered list of files in a directory
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There is one main difference: glob.glob('145592*.jpg') prints the whole absolute path of files while ls 145592*.jpg prints only the list of files.
– Ébe Isaac
Dec 2 '16 at 18:12
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Align items in a stack panel?
I was wondering if I can have 2 controls in a horizontal-oriented StackPanel so that the right item should be docked to the right side of the StackPanel.
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git branch -d gives warning
...t you no longer have a local copy of that branch, but it exists in origin
If you want to delete the remote branch as well, use git push --delete origin old_branch
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Branch from a previous commit using Git
If I have n commits, how can I branch from the n-3 commit?
19 Answers
19
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test a file upload using rspec - rails
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See bit.ly/OSrL7R (stack overflow question 3966263) if you are getting file does not exist errors. A different form is needed in Rails 3.2: @file = Rack::Test::UploadedFile.new(Rails.root.join('spec/fixtures/files/test.csv'), 'text/csv')
– Mike Blyth
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How do I update a Python package?
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You might want to look into a Python package manager like pip. If you don't want to use a Python package manager, you should be able to download M2Crypto and build/compile/install over the old installation.
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