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How do you Encrypt and Decrypt a PHP String?
... library written by and reviewed by cryptography experts.
Update: PHP 7.2 now provides libsodium! For best security, update your systems to use PHP 7.2 or higher and only follow the libsodium advice in this answer.
Use libsodium if you have PECL access (or sodium_compat if you want libsodium witho...
Garbage collector in Android
... @ThomasPornin - On the other hand, as an application programmer, you know something that the OS does not know: times at which your app is now going to make a major change in how it uses memory, and that it would be less disruptive to the user experience to take a pause now, than at an arbitrar...
Assignment in an if statement
...tion, but the alternatives usually involve code duplication, and when you know this pattern it's easy to get right.
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What is the easiest way to remove all packages installed by pip?
...ng command in place requirements.txt).
pip freeze > requirements.txt
Now to remove one by one
pip uninstall -r requirements.txt
If we want to remove all at once then
pip uninstall -r requirements.txt -y
If you're working on an existing project that has a requirements.txt file and your e...
“Large data” work flows using pandas
... store.append(g, frame, index=False, data_columns = v['dc'])
Now you have all of the tables in the file (actually you could store them in separate files if you wish, you would prob have to add the filename to the group_map, but probably this isn't necessary).
This is how you get colum...
How to get the first element of an array?
...umes that the first element in the array is always has an index of 0. You know what they say about assumption...
– Andy
Aug 9 '15 at 16:19
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How to edit incorrect commit message in Mercurial? [duplicate]
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Update: Mercurial has added --amend which should be the preferred option now.
You can rollback the last commit (but only the last one) with hg rollback and then reapply it.
Important: this permanently removes the latest commit (or pull). So if you've done a hg update that commit is no longer i...
How to reload the current state?
...d();. Although this seems a little overkill it could make testing/mocking/knowing all dependencies a piece of code has things a little easier.
– edhedges
Nov 5 '14 at 19:24
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Why does csvwriter.writerow() put a comma after each character?
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Now it also writes the quotation marks of the string. Is there a way around that?
– CGFoX
Nov 5 '16 at 19:07
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How to detect if a function is called as constructor?
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NOTE: This is now possible in ES2015 and later. See Daniel Weiner's answer.
I don't think what you want is possible [prior to ES2015]. There simply isn't enough information available within the function to make a reliable inference.
Look...