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When is null or undefined used in JavaScript? [duplicate]
...efers to does not exist.
This is one of the few times you may not want to test for equality-
if(x!==undefined) will be true for a null value
but if(x!= undefined) will be true (only) for values that are not either undefined or null.
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Bash if statement with multiple conditions throws an error
...AQ #17 (on grouping) and #31 (on the difference between different types of test expression). Actually, in this case it would be even easier to use an arithmetic expression.
– Gordon Davisson
Apr 24 '13 at 23:39
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Is there a “goto” statement in bash?
...ho "This is not printed!"
foo:
x=${x:-10}
echo x is $x
results in:
$ ./test.sh
x is 100
$ ./test.sh foo
x is 10
$ ./test.sh mid
This is not printed!
x is 101
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Is there any difference between “foo is None” and “foo == None”?
...me as:
if x is not None:
# do something
The former is a boolean value test and can evaluate to false in different contexts. There are a number of things that represent false in a boolean value tests for example empty containers, boolean values. None also evaluates to false in this situation but...
Mythical man month 10 lines per developer day - how close on large projects? [closed]
...d effort but many interactions wrt product updates and fixes identified in testing.
– J D
May 6 '12 at 10:00
7
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Elegant Python function to convert CamelCase to snake_case?
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This solution fails in these cases: _test_Method, __test__Method, _Test, getHTTPresponseCode, __CamelCase, and _Camel_Case.
– freegnu
May 16 '11 at 14:12
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Get list of passed arguments in Windows batch script (.bat)
...Label+xyz
exit /b
:MYlabel
echo func %0, %~0, %~f0
exit /b
Output
main test.bat, test.bat, C:\temp\test.bat
func :myLabel+xyz, :myLabel+xyz, C:\temp\test.bat
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Square retrofit server mock for testing
What's the best way to mock a server for testing when using the square retrofit framework .
11 Answers
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Move an array element from one array position to another
...splice(new_index, 0, arr.splice(old_index, 1)[0]);
return arr; // for testing
};
// returns [2, 1, 3]
console.log(array_move([1, 2, 3], 0, 1));
Note that the last return is simply for testing purposes: splice performs operations on the array in-place, so a return is not necessary. ...
“int main (vooid)”? How does that work?
I recently had to type in a small C test program and, in the process, I made a spelling mistake in the main function by accidentally using vooid instead of void .
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