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Opposite of push(); [duplicate]
...e opposite of push() (as the question is titled) is pop().
var exampleArray = ['myName'];
exampleArray.push('hi');
console.log(exampleArray);
exampleArray.pop();
console.log(exampleArray);
pop() will remove the last element from exampleArray and return that element ("hi") but it wi...
Dynamic variable names in Bash
...
Use an associative array, with command names as keys.
# Requires bash 4, though
declare -A magic_variable=()
function grep_search() {
magic_variable[$1]=$( ls | tail -1 )
echo ${magic_variable[$1]}
}
If you can't use associative arr...
is_null($x) vs $x === null in PHP [duplicate]
...marginally slower (function call overhead)
can be used as a callback, e.g. array_map('is_null', $array).
Personally, I use null === whenever I can, as it is more consistent with false === and true === checks.
If you want, you can check the code: is_identical_function (===) and php_is_type (is_nul...
mongodb find by multiple array items
... This helped me too, I needed it to find an object ID in an array, and where something like $in: [ ObjectId("4f9f2c336b810d0cf0000017") ] failed, $in: [ "4f9f2c336b810d0cf0000017" ] worked
– jbnunn
May 3 '12 at 15:43
...
What does numpy.random.seed(0) do?
...bers predictable
>>> numpy.random.seed(0) ; numpy.random.rand(4)
array([ 0.55, 0.72, 0.6 , 0.54])
>>> numpy.random.seed(0) ; numpy.random.rand(4)
array([ 0.55, 0.72, 0.6 , 0.54])
With the seed reset (every time), the same set of numbers will appear every time.
If the rand...
form serialize javascript (no framework)
...a polyfill and this code (works everywhere except IE):
new URLSearchParams(Array.from(new FormData(formElement))).toString()
Example
var form = document.querySelector('form');
var out = document.querySelector('output');
function updateResult() {
try {
out.textContent = new URLSearchParam...
What's a reliable way to make an iOS app crash?
...method implemented in that class haha
Or index beyond bound exception:
NSArray * array = [NSArray array];
[array objectAtIndex:5];
And of course
kill( getpid(), SIGABRT );
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Is there a command like “watch” or “inotifywait” on the Mac?
...;logger</string>
<key>ProgramArguments</key>
<array>
<string>/usr/bin/logger</string>
<string>path modified</string>
</array>
<key>WatchPaths</key>
<array>
<string>/Users/sakra/D...
Multiple Updates in MySQL
... END WHERE id IN ('.implode(', ', array_keys(blockOperationChecked )).');';
– Boolean_Type
Feb 15 '17 at 8:43
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PHP check whether property exists in object or class
...
@b_dubb no, empty array, 0, false, null, '' all return true by `empty()'
– Peter
Jan 21 '19 at 20:26
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