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Test for non-zero length string in Bash: [ -n “$var” ] or [ “$var” ]
...t: This is a more complete version that shows more differences between [ (aka test) and [[.
The following table shows that whether a variable is quoted or not, whether you use single or double brackets and whether the variable contains only a space are the things that affect whether using a test wi...
Should I put #! (shebang) in Python scripts, and what form should it take?
...hebang line in any script determines the script's ability to be executed like a standalone executable without typing python beforehand in the terminal or when double clicking it in a file manager (when configured properly). It isn't necessary but generally put there so when someone sees the file ope...
Java code for getting current time [duplicate]
....getTime()) );
}
}
You can format SimpleDateFormat in the way you like. For any additional information you can look in java api:
SimpleDateFormat
Calendar
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Kill a postgresql session/connection
How can I kill all my postgresql connections?
20 Answers
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Can I use Objective-C blocks as properties?
Is it possible to have blocks as properties using the standard property syntax?
8 Answers
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How to calculate the SVG Path for an arc (of a circle)
...400, 100, 0, 180));
and in your html
<path id="arc1" fill="none" stroke="#446688" stroke-width="20" />
Live demo
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Why doesn't Dictionary have AddRange?
...documented and shipped that feature. - @Gabe Moothart
As to why? Well, likely because the behavior of merging dictionaries can't be reasoned about in a manner that fits with the Framework guidelines.
AddRange doesn't exist because a range doesn't have any meaning to an associative container, as t...
delete word after or around cursor in VIM
...M from TextMate. I found ^+W in INSERT mode very useful. However, I'd like to delete not only the word before cursor, but the word after or around cursor as well.
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How to add a list item to an existing unordered list?
I have code that looks like this:
13 Answers
13
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Pretty Printing a pandas dataframe
How can I print a pandas dataframe as a nice text-based table, like the following?
9 Answers
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