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Best way to give a variable a default value (simulate Perl ||, ||= )
... to do $var = @$var ?: 'default value'; If so, why? Given that the only "error" could be that $var isn't set, and that we don't care if $var isn't set...
– Codemonkey
Nov 13 '15 at 14:14
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How to create an infinite loop in Windows batch file?
...s)
rem ** can be stopped with exit
rem ** can be stopped with a syntax error
call :stop
)
:stop
call :__stop 2>nul
:__stop
() creates a syntax error, quits the batch
This could be useful if you need a really infinite loop, as it is much faster than a goto :loop version because a for-loo...
Get Folder Size from Windows Command Line
...m"
– zumalifeguard
Mar 25 '16 at 19:05
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OS detecting makefile
...
this breaks on osx too. /bin/sh: -c: line 0: syntax error near unexpected token ,Windows_NT' /bin/sh: -c: line 0: ifeq (,Windows_NT)' make: *** [os] Error 2
– k107
Dec 2 '16 at 7:58
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Android Facebook integration with invalid key hash
...you add wrong information in the settings page, it means it will give some error. So use the correct information there. And also if the public (other than you) need to use your application means you need to enable the permission (change "yes" in the "Status & Review" next to the setting).
...
Transpose list of lists
...oesn't seem to work for Py3. The generator is created but next() raises an error immediately: TypeError: 'NoneType' object is not callable.
– Mad Physicist
Sep 13 '16 at 15:32
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How can I count the occurrences of a list item?
... very late to the party but wouldn't following code throw an error if a list contained more than one instance of i, because it will try to enter multiple keys of same value in a dictionary. dict((i, a.count(i)) for i in a)
– rp1
Sep 16 '19 a...
Properties file in python (similar to Java Properties)
... MattGood!
– Dan H
May 11 '12 at 20:05
1
if you add pip install and a code example your answer wi...
What is the scope of variables in JavaScript?
...perties on the global object.
Examples
The following will throw a ReferenceError because the namesx, y, and z have no meaning outside of the function f.
function f() {
var x = 1
let y = 1
const z = 1
}
console.log(typeof x) // undefined (because var has function scope!)
console.log(t...
How to remove “index.php” in codeigniter's path
...ase.
– Sean Vieira
Jan 10 '15 at 18:05
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