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How do I use boolean variables in Perl?

... @BlueWaldo: you can also use cmp and <=> when comparing and assigning the results of the comparison to a scalar. $var = $var1 cmp $var2; 'cmp' and '<=>' (used for numeric comparisons) returns -1, 0, or 1 if left argument is less than, equal to,...
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How to validate an email address in JavaScript

... for "RFC822" or "RFC2822" to get a proper regex. – Randal Schwartz Sep 8 '10 at 2:34 45 This doe...
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Naming returned columns in Pandas aggregate function? [duplicate]

I'm having trouble with Pandas' groupby functionality. I've read the documentation , but I can't see to figure out how to apply aggregate functions to multiple columns and have custom names for those columns. ...
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What exactly are iterator, iterable, and iteration?

What is the most basic definition of "iterable", "iterator" and "iteration" in Python? 13 Answers ...
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How do I copy a string to the clipboard on Windows using Python?

...to make a basic Windows application that builds a string out of user input and then adds it to the clipboard. How do I copy a string to the clipboard using Python? ...
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Why does Hibernate require no argument constructor?

I got this hand-wavy answer but could somebody explain further? Thanks 9 Answers 9 ...
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How to use z-index in svg elements?

...Fiddle. Solution (alternative) The tag use with the attribute xlink:href and as value the id of the element. Keep in mind that might not be the best solution even if the result seems fine. Having a bit of time, here the link of the specification SVG 1.1 "use" Element. Purpose: To avoid re...
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Why are there no ++ and --​ operators in Python?

Why are there no ++ and -- operators in Python? 19 Answers 19 ...
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Custom CSS Scrollbar for Firefox

...verflow.com/a/54101063/405015 https://stackoverflow.com/a/53739309/405015 And this for background info: https://bugzilla.mozilla.org/show_bug.cgi?id=1460109 There's no Firefox equivalent to ::-webkit-scrollbar and friends. You'll have to stick with JavaScript. Plenty of people would like this feat...
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FIND_IN_SET() vs IN()

I have 2 tables in my database. One is for orders, and one is for companies. 6 Answers ...