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While loop to test if a file exists in bash
...xists by adding:
while [ ! -f /tmp/list.txt ]
do
sleep 2 # or less like 0.2
done
ls -l /tmp/list.txt
You might also make sure that you're using a Bash (or related) shell by typing 'echo $SHELL'. I think that CSH and TCSH use a slightly different semantic for this loop.
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Adding external library in Android studio
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edited Sep 3 '19 at 7:05
Machado
3,22033 gold badges2828 silver badges4343 bronze badges
answered Se...
How do I check if an array includes a value in JavaScript?
...ay, value)
Lodash: _.includes(array, value, [from]) (is _.contains prior 4.0.0)
Ramda: R.includes(value, array)
Notice that some frameworks implement this as a function, while others add the function to the array prototype.
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How do I update pip itself from inside my virtual environment?
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edited Sep 7 '16 at 20:09
M. Dudley
25.4k2929 gold badges132132 silver badges224224 bronze badges
a...
How do I check if a type provides a parameterless constructor?
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170
The Type class is reflection. You can do:
Type theType = myobject.GetType(); // if you have an ...
Find the last element of an array while using a foreach loop in PHP
...t sounds like you want something like this:
$numItems = count($arr);
$i = 0;
foreach($arr as $key=>$value) {
if(++$i === $numItems) {
echo "last index!";
}
}
That being said, you don't -have- to iterate over an "array" using foreach in php.
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How to change string into QString?
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answered Nov 29 '09 at 0:00
Kamil SzotKamil Szot
14.7k66 gold badges5353 silver badges6262 bronze badges
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How to remove non-alphanumeric characters?
I need to remove all characters from a string which aren't in a-z A-Z 0-9 set or are not spaces.
9 Answers
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Getting the class name from a static method in Java
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edited May 23 '17 at 12:10
Community♦
111 silver badge
answered Jun 1 '09 at 20:44
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How to sort mongodb with pymongo
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305
.sort(), in pymongo, takes key and direction as parameters.
So if you want to sort by, let's s...