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Are there disadvantages to using a generic varchar(255) for all text-based fields?
...s the space that can be specified for legibility).
email addresses - up to 64 bytes before the @, up to 255 bytes after. Never more, lest you break the Internet.
North American Phone Numbers are never more than 10 digits (excluding the country code).
Computers running (recent versions of) Windows c...
Seeding the random number generator in Javascript
...;>> 16, 2246822507);
h = Math.imul(h ^ h >>> 13, 3266489909);
return (h ^= h >>> 16) >>> 0;
}
}
Each subsequent call to the return function of xmur3 produces a new "random" 32-bit hash value to be used as a seed in a PRNG. Here's how you might u...
CSS filter: make color image with transparency white
...s.
Here's a JSFiddle changing the colour of the JSFiddle logo.
//Base64 source, but any local source will work
var src = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAC0AAAAgCAYAAACGhPFEAAAABGdBTUEAALGPC/xhBQAABzhJREFUWAnNWAtwXFUZ/v9zs4GUJJu+k7tb5DFAGWO1aal1sJUiY3FQQaWidqgPLAMqYzd9CB073Vodh...
Zoom in on a point (using scale and translate)
... scale /= 2;
}
scale = scale < 1 ? 1 : (scale > 64 ? 64 : scale);
// determine the location on the screen at the new scale
var xNew = (xScreen - xImage) / scale;
var yNew = (yScreen - yImage) / scale;
// save the current screen location
...
What's the difference between the atomic and nonatomic attributes?
...cks Another fun one; on certain architectures (Can't remember which one), 64 bit values passed as an argument might be passed half in a register and half on the stack. atomic prevents cross-thread half-value reads. (That was a fun bug to track down.)
– bbum
...
How can I auto-elevate my batch file, so that it requests from UAC administrator rights if required?
...ically check & get admin rights
:: see "https://stackoverflow.com/a/12264592/1016343" for description
::::::::::::::::::::::::::::::::::::::::::::
@echo off
CLS
ECHO.
ECHO =============================
ECHO Running Admin shell
ECHO =============================
:init
setlocal DisableDela...
What do the terms “CPU bound” and “I/O bound” mean?
...
rlandster
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answered May 15 '09 at 13:07
unwindunwind
...
Compiled vs. Interpreted Languages
...8
Marie
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answered Jul 16 '10 at 14:00
mikeramikera
99.8k2323 gold ba...
Why '&&' and not '&'?
... = 00110010 (in decimal: 32+16+2 = 50)
b = 01010011 (in decimal: 64+ 16+2+1 = 83)
----------------
a & b = 00010010 (in decimal: 16+2 = 18)
a | b = 01110011 (in decimal: 64+32+16+2+1 = 115)
while a logical operator only works in bool:
a = true
b = false
---------...
Python - Create a list with initial capacity
...
Ned BatchelderNed Batchelder
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...