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How to get first element in a list of tuples?

I have a list like below where the first element is the id and the other is a string: 12 Answers ...
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How can I make setInterval also work when a tab is inactive in Chrome?

... On most browsers inactive tabs have low priority execution and this can affect JavaScript timers. If the values of your transition were calculated using real time elapsed between frames instead fixed increments on each interval, you not only workaround this issue but also can achiev...
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Why does substring slicing with index out of range work?

... You're correct! 'example'[3:4] and 'example'[3] are fundamentally different, and slicing outside the bounds of a sequence (at least for built-ins) doesn't cause an error. It might be surprising at first, but it makes sense when you think about it. Indexi...
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How can I use numpy.correlate to do autocorrelation?

I need to do auto-correlation of a set of numbers, which as I understand it is just the correlation of the set with itself. ...
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How to check if smtp is working from commandline (Linux) [closed]

...umber} So telnet to your smtp server like telnet smtp.mydomain.com 25 And copy and paste the below helo client.mydomain.com mail from:<sender@mydomain.com> rcpt to:<to_email@mydomain.com> data From: test@mydomain.com Subject: test mail from command line this is test number 1 sent ...
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Can jQuery get all CSS styles associated with an element?

Is there a way in jQuery to get all CSS from an existing element and apply it to another without listing them all? 5 Answer...
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How do I test if a variable is a number in Bash?

... the regex appropriately; for instance: ^[0-9]+([.][0-9]+)?$ ...or, to handle numbers with a sign: ^[+-]?[0-9]+([.][0-9]+)?$ share | improve this answer | follow ...
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How to extract text from a string using sed?

... That's why, isn't it? Replace whatever comes before and after the match with norhing, then print the whole line. – tripleee Jul 19 '12 at 21:01 ...
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Difference between CPPFLAGS and CXXFLAGS in GNU Make

What's the difference between CPPFLAGS and CXXFLAGS in GNU Make? 4 Answers 4 ...
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Diff output from two programs without temporary files

Say I have too programs a and b that I can run with ./a and ./b . 6 Answers 6 ...