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HTML5 Pre-resize images before uploading
...e.target.result}
reader.readAsDataURL(file);
var ctx = canvas.getContext("2d");
ctx.drawImage(img, 0, 0);
var MAX_WIDTH = 800;
var MAX_HEIGHT = 600;
var width = img.width;
var height = img.height;
if (width > height) {
if (width > MAX_WIDTH) {
height *= MAX_WIDTH / width;
width = ...
How do I fix the “You don't have write permissions into the /usr/bin directory” error when installin
...ls 3 on a brand new MacBook Pro running OS X 10.6.3, Ruby 1.8.7, and Rails 2.3.5 and I'm wondering if I've hosed myself. So far, I've run these commands:
...
How do I stop Chrome from yellowing my site's input boxes?
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answered Oct 6 '08 at 20:09
Ben HoffsteinBen Hoffstein
96.4k88 gold badges9898 silver badges118118 bronze badges
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Using wget to recursively fetch a directory with arbitrary files in it
... |
edited Oct 4 '17 at 21:53
waldyrious
2,95844 gold badges2727 silver badges3333 bronze badges
answe...
How do I remove all non alphanumeric characters from a string except dash?
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82
Worth mentioning that - must be at the end of the character class, or escaped with a backslash, to prevent being used for a range.
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Difference between Covariance & Contra-variance
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268
The question is "what is the difference between covariance and contravariance?"
Covariance an...
Short circuit Array.forEach like calling break
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2231
There's no built-in ability to break in forEach. To interrupt execution you would have to thr...
Why Choose Struct Over Class?
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According to the very popular WWDC 2015 talk Protocol Oriented Programming in Swift (video, transcript), Swift provides a number of features that make structs better than classes in many circumstances.
Structs are preferable if they are relatively small and c...
What is the fastest way to get the value of π?
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22 Answers
22
Active
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Is there a shortcut to make a block comment in Xcode?
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237
Try command + /. It works for me.
So, you just highlight the block of code you want to comme...