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Why does Double.NaN==Double.NaN return false?

I was just studying OCPJP questions and I found this strange code: 9 Answers 9 ...
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Best way to find the intersection of multiple sets?

...e", what you are looking for is the reduce function: from operator import and_ from functools import reduce print(reduce(and_, [{1,2,3},{2,3,4},{3,4,5}])) # = {3} or print(reduce((lambda x,y: x&y), [{1,2,3},{2,3,4},{3,4,5}])) # = {3} ...
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Responsively change div size keeping aspect ratio [duplicate]

...e same effect with another element, is it possible at all to tie the width and the height together using percentage? 5 Answ...
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Adding placeholder text to textbox

...; myTxtbx.Text = "Enter text here..."; myTxtbx.GotFocus += GotFocus.EventHandle(RemoveText); myTxtbx.LostFocus += LostFocus.EventHandle(AddText); public void RemoveText(object sender, EventArgs e) { if (myTxtbx.Text == "Enter text here...") { myTxtbx.Text = ""; } } public void A...
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Merge / convert multiple PDF files into one PDF

...er to provide out.pdf, or else it will overwrite the last file in your command, sigh. – mlissner Oct 19 '13 at 22:20 10 ...
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Why can't I have abstract static methods in C#?

I've been working with providers a fair bit lately, and I came across an interesting situation where I wanted to have an abstract class that had an abstract static method. I read a few posts on the topic, and it sort of made sense, but is there a nice clear explanation? ...
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how to disable DIV element and everything inside [duplicate]

I need to disable a DIV and all it's content using Javascript. I can swear that doing a simple 5 Answers ...
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Is it bad practice to make a setter return “this”?

...you know which fields you need to set at the time you're writing the code, and there are many different combinations for which fields you want to set. Alternatives to this method might be: One mega constructor (downside: you might pass lots of nulls or default values, and it gets hard to know w...
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How to merge remote changes at GitHub?

... for details. You can perform "git pull", resolve potential conflicts, and "git push" the result. A "git pull" will create a merge commit C between commits A and B. Alternatively, you can rebase your change between X and B on top of A, with "git pull --rebase", and push the result back. The...
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How do I get a plist as a Dictionary in Swift?

I am playing around with Apple's new Swift programming language and have some problems... 26 Answers ...