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What's the best way to set a single pixel in an HTML5 canvas?
...e
var d = id.data; // only do this once per page
d[0] = r;
d[1] = g;
d[2] = b;
d[3] = a;
myContext.putImageData( id, x, y );
Use fillRect() to draw a pixel (there should be no aliasing issues):
ctx.fillStyle = "rgba("+r+","+g+","+b+","+(a/255)+")";
ctx.fillRect...
What is the default initialization of an array in Java?
...hing that holds an object) that is null.
For int/short/byte/long that is a 0.
For float/double that is a 0.0
For booleans that is a false.
For char that is the null character '\u0000' (whose decimal equivalent is 0).
When you create an array of something, all entries are also zeroed. So your arra...
Get current batchfile directory
...You can get the name of the batch script itself as typed by the user with %0 (e.g. scripts\mybatch.bat). Parameter extensions can be applied to this so %~dp0 will return the Drive and Path to the batch script (e.g. W:\scripts\) and %~f0 will return the full pathname (e.g. W:\scripts\mybatch.cmd).
Y...
How to create a loop in bash that is waiting for a webserver to respond?
...
10
The use of backticks ` ` is outdated. Use $( ) instead.
– Serge Stroobandt
Apr 18 '14 at 15:37
...
How to only find files in a given directory, and ignore subdirectories using bash
...
205
If you just want to limit the find to the first level you can do:
find /dev -maxdepth 1 -name...
How can I format patch with what I stash away
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edited Jul 1 at 12:02
Iulian Onofrei
6,77988 gold badges5252 silver badges9393 bronze badges
answ...
A regex to match a substring that isn't followed by a certain other substring
...--------------------
.* any character except \n (0 or more times
(matching the most amount possible))
--------------------------------------------------------------------------------
bar 'bar'
---------------------------...
What is a “memory stomp”?
...e are several common ways memory can be stomped.
One is allocating, say, 100 bytes of memory but then storing something past the 100th address. This memory might be used to hold something completely different. This is particularly hard to debug because the problem will appear when something tries t...
Get and set position with jQuery .offset()
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edited Apr 7 '17 at 6:04
pstanton
27.9k2323 gold badges104104 silver badges160160 bronze badges
answ...
Check if a string contains another string
...
390
Use the Instr function
Dim pos As Integer
pos = InStr("find the comma, in the string", ",")
...