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Why does !{}[true] evaluate to true in JavaScript?
... Not if you do eval('{}[true]') or type it to console. Then e.g. als {}"test" is test or even {key:"value"}"test" is test.
– t.niese
Oct 31 '13 at 9:42
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SQL Server IN vs. EXISTS Performance
...
I've done some testing on SQL Server 2005 and 2008, and on both the EXISTS and the IN come back with the exact same actual execution plan, as other have stated. The Optimizer is optimal. :)
Something to be aware of though, EXISTS, IN, and ...
Best practices for SQL varchar column length [closed]
...ole table, see e.g. here. Since 9.2 this is no longer the case and a quick test confirmed that increasing the column size for a table with 1.2 million rows indeed only took 0.5 seconds.
For Oracle this seems to be true as well, judging by the time it takes to alter a big table's varchar column. Bu...
How to get current CPU and RAM usage in Python?
...s more concepts and interest concepts:
https://psutil.readthedocs.io/en/latest/
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What are the disadvantages of using persistent connection in PDO
...
On my tests I had a connection time of over a second to my localhost, thus assuming I should use a persistent connection. Further tests showed it was a problem with 'localhost':
Test results in seconds (measured by php microtime):...
How can I perform a reverse string search in Excel without using VBA?
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This one is tested and does work (based on Brad's original post):
=RIGHT(A1,LEN(A1)-FIND("|",SUBSTITUTE(A1," ","|",
LEN(A1)-LEN(SUBSTITUTE(A1," ","")))))
If your original strings could contain a pipe "|" character, then replace b...
Get file size, image width and height before upload
...;
const readImage = file => {
if ( !(/^image\/(png|jpe?g|gif)$/).test(file.type) )
return EL_preview.insertAdjacentHTML('beforeend', `Unsupported format ${file.type}: ${file.name}<br>`);
const img = new Image();
img.addEventListener('load', () => {
EL_preview.app...
JQuery to load Javascript file dynamically
...acks
return jQuery.ajax( options );
};
// Usage
$.cachedScript( "ajax/test.js" ).done(function( script, textStatus ) {
console.log( textStatus );
});
===
Or, if you want to disable caching globally, you can do so using ajaxSetup() as follows:
$.ajaxSetup({
cache: true
});
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IE8 and JQuery's trim()
...one's Code Review because they used the OP's syntax. They obviously didn't test in any version of MSIE.
– Adrian J. Moreno
May 20 '11 at 18:56
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How to detect which one of the defined font was used in a web page?
...tch
Gecko.
I took a pass at this problem and created Font Unstack, which tests each font in a stack and returns the first installed one only. It uses the trick that @MojoFilter mentions, but only returns the first one if multiple are installed. Though it does suffer from the weakness that @tlrobin...