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My attempt at value initialization is interpreted as a function declaration, and why doesn't A a(())
Among the many things Stack Overflow has taught me is what is known as the "most vexing parse", which is classically demonstrated with a line such as
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Python: try statement in a single line
...thing not to know whether a variable exists in Python, like you would in some other dynamic languages. The safer way (and the prevailing style) is to set all variables to something. If they might not get set, set them to None first (or 0 or '' or something if it is more applicable.)
If you do ass...
How to unzip files programmatically in Android?
...e format they were in the zipped file. Please post your knowledge and help me out.
14 Answers
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Efficiently test if a port is open on Linux?
...as the file descriptor because 0,1,2 are stdin, stdout, and stderr. 5 is sometimes used by Bash for child processes, so 3,4,6,7,8, and 9 should be safe.
As per the comment below, to test for listening on a local server in a script:
exec 6<>/dev/tcp/127.0.0.1/445 || echo "No one is listening!...
Rename package in Android Studio
How do you rename packages in the new IDE Android Studio, based on IntelliJ IDEA?
52 Answers
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Get the time difference between two datetimes
I know I can do anything and some more envolving Dates with momentjs. But embarrassingly, I'm having a hard time trying to do something that seems simple: geting the difference between 2 times.
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How to select from subquery using Laravel Query Builder?
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In addition to @delmadord's answer and your comments:
Currently there is no method to create subquery in FROM clause, so you need to manually use raw statement, then, if necessary, you will merge all the bindings:
$sub = Abc::where(..)->groupBy(..); // Eloquent Build...
Updating packages in Emacs
... have the following setup for packages (not sure if there is a better recommended one):
4 Answers
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Strangest language feature
...owever, the lesser known form (which really does work!) is:
10[a]
which means the same as the above.
share
edited Jan 3 '10 at 15:57
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Javascript Thousand Separator / string format [duplicate]
...g
So you can do:
(1234567.89).toLocaleString('en') // for numeric input
parseFloat("1234567.89").toLocaleString('en') // for string input
The function implemented below works, too, but simply isn't necessary.
(I thought perhaps I'd get lucky and find out that it was necessary back...