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Get first key in a (possibly) associative array?
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2019 Update
Starting from PHP 7.3, there is a new built in function called array_key_first() which will retrieve the first key from the given array without resetting the internal pointer. Check out the documentation for more ...
How does MySQL process ORDER BY and LIMIT in a query?
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It will order first, then get the first 20. A database will also process anything in the WHERE clause before ORDER BY.
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Check if inputs are empty using jQuery
...g');
}
});
And you don't necessarily need .length or see if it's >0 since an empty string evaluates to false anyway but if you'd like to for readability purposes:
$('#apply-form input').blur(function()
{
if( $(this).val().length === 0 ) {
$(this).parents('p').addClass('warning'...
System.Net.Http: missing from namespace? (using .net 4.5)
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108
HttpClient lives in the System.Net.Http namespace.
You'll need to add:
using System.Net.Http;...
how to disable DIV element and everything inside [duplicate]
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edited Mar 21 '13 at 18:40
answered Mar 21 '13 at 18:33
Da...
How can I get the iOS 7 default blue color programmatically?
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answered Sep 26 '13 at 16:10
Aaron BragerAaron Brager
60.7k1616 gold badges143143 silver badges255255 bronze badges
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jQuery get the location of an element relative to window
... log(eTop - $(window).scrollTop());
});
});
#element {
margin: 140px;
text-align: center;
padding: 5px;
width: 200px;
height: 200px;
border: 1px solid #0099f9;
border-radius: 3px;
background: #444;
color: #0099d9;
opacity: 0.6;
}
#log {
position: fixed;
t...
MySQL select 10 random rows from 600K rows fast
How can I best write a query that selects 10 rows randomly from a total of 600k?
26 Answers
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