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What is a monad?

... As someone who has had a great deal of problems understanding monads, I can say that this answer helped.. a little. However, there's still some things that I don't understand. In what way is the list comprehension a monad? Is there ...
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Iterate a list as pair (current, next) in Python

...ooking at the "current" element and the "next" element. I have, till now, done so with code like: 10 Answers ...
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Why do browsers match CSS selectors from right to left?

... Keep in mind that when a browser is doing selector matching it has one element (the one it's trying to determine style for) and all your rules and their selectors and it needs to find which rules match the element. This is different from the usual jQuery thing, say, where you only have one ...
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Changing all files' extensions in a folder with one command on Windows

...nt to change all extensions, just use the wildcard again: ren *.* *.YYY One way to make this work recursively is with the FOR command. It can be used with the /R option to recursively apply a command to matching files. For example: for /R %x in (*.txt) do ren "%x" *.renamed will change all .txt...
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How to deal with INSTALL_PARSE_FAILED_INCONSISTENT_CERTIFICATES without uninstall?

...nt development machine (e.g., some other developer's machine). Or, the old one is signed with your production key and the new one is signed with your debug key. share | improve this answer ...
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How to send email to multiple recipients using python smtplib?

... the documentation does have the example: tolist =["one@one.org","two@two.org","three@three.org","four@four.org"] – chug2k Sep 23 '13 at 22:27 2 ...
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Format bytes to kilobytes, megabytes, gigabytes

...ow would I display this on a web page as "5.2 MB" AND have files less than one megabyte display as KB and files one gigabyte and above display as GB? ...
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What is the usefulness of `enable_shared_from_this`?

...umentation I am still lost for how this should correctly be used. Can someone please give me an example and explanation of when using this class makes sense. ...
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Learning Regular Expressions [closed]

...rt in square brackets is a character class, which means it matches exactly one of the enclosed characters. You can also use ranges in character classes, so [a-c] matches either 'a' or 'b' or 'c'. The pattern . is special: rather than matching a literal dot only, it matches any character†. It's th...
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Regex to check whether a string contains only numbers [duplicate]

.../; should do it. The original matches anything that consists of exactly one digit. share | improve this answer | follow | ...