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Get a pixel from HTML Canvas?
....getContext('2d');
// Get the CanvasPixelArray from the given coordinates and dimensions.
var imgd = context.getImageData(x, y, width, height);
var pix = imgd.data;
// Loop over each pixel and invert the color.
for (var i = 0, n = pix.length; i < n; i += 4) {
pix[i ] = 255 - pix[i ]; // r...
PowerShell Script to Find and Replace for all Files with a Specific Extension
...t all worked, but this one was the easiest for readability. I was able to hand this to a co-worker and he could easily understand what was going on. Thanks for the assistance.
– Brandon
May 18 '10 at 18:37
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Regex: Remove lines containing “help”, etc
I have a long document of commands. Using Notepad++ or regex, I want to delete all lines containing "help" including keyboard_help, etc.
...
Difference between JOIN and INNER JOIN
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It's ANSI SQL standard. See more: contrib.andrew.cmu.edu/~shadow/sql/sql1992.txt; en.wikipedia.org/wiki/SQL-92
– Indian
Jan 26 '18 at 10:14
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std::vector performance regression when enabling C++11
...ode the generated code is significantly more cluttered than for C++98 mode and inlining the function
void std::vector<Item,std::allocator<Item>>::_M_emplace_back_aux<Item>(Item&&)
fails in C++11 mode with the default inline-limit.
This failed inline has a domino effect. N...
What do the terms “CPU bound” and “I/O bound” mean?
What do the terms "CPU bound" and "I/O bound" mean?
11 Answers
11
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How do I escape ampersands in batch files?
How do I escape ampersands in a batch file (or from the
Windows command line) in order to use the start command to
open web pages with ampersands in the URL?
...
is_null($x) vs $x === null in PHP [duplicate]
PHP has two (that I know of, and three if you count isset() ) methods to determine if a value is null: is_null() and === null . I have heard, but not confirmed, that === null is faster, but in a code review someone strongly suggested that I use is_null() instead as it is specifically design...
What is the difference between a “function” and a “procedure”?
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A function returns a value and a procedure just executes commands.
The name function comes from math. It is used to calculate a value based on input.
A procedure is a set of command which can be executed in order.
In most programming languages, even...
How to get a substring between two strings in PHP?
... one but really don't think it's the best way to go). Thinking of strpos and substr functions.
Here's an example:
32 A...