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Check if PHP session has already started
... really think about refactoring your session management code if you don't know whether or not a session is started...
That said, my opinion is subjective, and there are situations (examples of which are described in the comments below) where it may not be possible to know if the session is started....
Print all properties of a Python Class [duplicate]
...name': 'Dog', 'color': 'Spotted', 'age': 10, 'legs': 2, 'smell': 'Alot'}
# now dump this in some way or another
print(', '.join("%s: %s" % item for item in attrs.items()))
If you want to store Python objects on the disk you should look at shelve — Python object persistence.
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Meaning of $? (dollar question mark) in shell scripts
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This is even more wrong now. [ 1 ] and [ 0 ] are both true; [ without an operator checks if the argument is a non-empty string.
– tripleee
Jun 30 '19 at 17:05
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Java String to SHA1
..."my string") instead of reinventing the wheel (though it's interesting to know how to convert to hex by hand)?
– Jon Onstott
Jun 23 '15 at 15:34
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Remove ALL white spaces from text
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Now you can use "replaceAll":
console.log(' a b c d e f g '.replaceAll(' ',''));
will print:
abcdefg
But not working in every possible browser:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global...
How to extract a floating number from a string [duplicate]
...you meant "\d+\.\d+" instead of "\d+.\d+" in your first code block. Right now it would extract something like '13a4'.
– abw333
Dec 6 '15 at 1:00
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Android: remove notification from notification bar
... with an event I manage to add notification in android notification bar. Now I need sample how to remove that notification from notification bar on an event ??
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Xcode: Build Failed, but no error messages
...t not Archive. Further googling of your error message should resolve that now that it has been revealed.
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Blank space at top of UITextView in iOS 10
I have UITextView with some text in it. Everything was fine with iOS 6 but now with iOS 7 it leaves the blank space on top and then place the text below the middle of the textview.
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Split output of command by columns using Bash?
... space, obviously
$ <command> | sed -e "s/.*/ &/" | tr -s " "
Now, for this particular case of pid numbers (not names), there is a function called pgrep:
$ pgrep ssh
Shell functions
However, in general it is actually still possible to use shell functions in a concise manner, because...