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Check if a variable is of function type
...efficient, but the best way to check, when efficiency isn't an issue, is written on underscore's page linked by @Paul Rosania.
Inspired by underscore, the final isFunction function is as follows:
function isFunction(functionToCheck) {
return functionToCheck && {}.toString.call(functionToC...
Reading output of a command into an array in Bash
...characters like *, ?, [...].
To get the output of a command in an array, with one line per element, there are essentially 3 ways:
With Bash≥4 use mapfile—it's the most efficient:
mapfile -t my_array < <( my_command )
Otherwise, a loop reading the output (slower, but safe):
my_array=(...
What does it mean when an HTTP request returns status code 0?
What does it mean when JavaScript network calls such as fetch or XMLHttpRequest, or any other type of HTTP network request, fail with an HTTP status code of 0?
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The simplest way to comma-delimit a list?
What is the clearest way to comma-delimit a list in Java?
30 Answers
30
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An existing connection was forcibly closed by the remote host
I am working with a commercial application which is throwing a SocketException with the message,
11 Answers
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Deleting queues in RabbitMQ
I have a few queues running with RabbitMQ. A few of them are of no use now, how can I delete them? Unfortunately I had not set the auto_delete option.
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How to pop an alert message box using PHP?
...o the client's browser. PHP is a server-side language. This is what allows it do things like INSERT something into a database on the server.
But an alert is rendered by the browser of the client. You would have to work through javascript to get an alert.
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Android app in Eclipse: Edit text not showing on Graphical layout
...text option on to the graphical layout, a message at the bottom comes up. It reads
Exception raised during rendering: java.lang.System.arraycopy([CI[CII)V
Exception details are logged in Window > Show View > Error Log
Even when I go to Window > Show View there is no error log option. T...
How to identify numpy types in python?
...o get the type, then you can use the __module__ property to find out where it was defined:
>>> import numpy as np
a = np.array([1, 2, 3])
>>> type(a)
<type 'numpy.ndarray'>
>>> type(a).__module__
'numpy'
>>> type(a).__module__ == np.__name__
True
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John Carmack's Unusual Fast Inverse Square Root (Quake III)
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FYI. Carmack didn't write it. Terje Mathisen and Gary Tarolli both take partial (and very modest) credit for it, as well as crediting some other sources.
How the mythical constant was derived is something of a mystery.
To quote Gary Tarolli:
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