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How to implode array with key and value without foreach in PHP
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and another way:
$input = array(
'item1' => 'object1',
'item2' => 'object2',
'item-n' => 'object-n'
);
$output = implode(', ', array_map(
function ($v, $k) {
if(is_array($v)){
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Pandas aggregate count distinct
Let's say I have a log of user activity and I want to generate a report of total duration and the number of unique users per day.
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Swapping two variable value without using third variable
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*x ^= *y;
}
}
Why the test?
The test is to ensure that x and y have different memory locations (rather than different values). This is because (p xor p) = 0 and if both x and y share the same memory location, when one is set to 0, both are set to 0.
When both *x and *y are 0, all o...
Sending message through WhatsApp
...at whatsapp doesn't support this, I was wondering if something had changed and if there is a way to open a whatsapp 'chat' with a number that I'm sending through an intent?
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strdup() - what does it do in C?
...hat it sounds like, assuming you're used to the abbreviated way in which C and UNIX assigns words, it duplicates strings :-)
Keeping in mind it's actually not part of the ISO C standard itself(a) (it's a POSIX thing), it's effectively doing the same as the following code:
char *strdup(const char *...
Javascript: formatting a rounded number to N decimals
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@deepeshk in what browser? Just tried it in Chrome 17 and 1.02449999998.toFixed(4) correctly returns 1.0245.
– Matt Ball
Mar 13 '12 at 14:40
3
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Getters \ setters for dummies
I've been trying to get my head around getters and setters and its not sinking in. I've read JavaScript Getters and Setters and Defining Getters and Setters and just not getting it.
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how do I strip white space when grabbing text with jQuery?
...,'');
That will remove all the spaces
If you want to remove the leading and trailing whitespace only, use the jQuery $.trim method :
var emailAdd = $.trim($(this).text());
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./configure : /bin/sh^M : bad interpreter [duplicate]
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To fix, open your script with vi or vim and enter in vi command mode (key Esc), then type this:
:set fileformat=unix
Finally save it
:x! or :wq!
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improv...
Remove leading and trailing spaces?
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You can use the strip() to remove trailing and leading spaces.
>>> s = ' abd cde '
>>> s.strip()
'abd cde'
Note: the internal spaces are preserved
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