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How to change the opacity (alpha, transparency) of an element in a canvas element after it has been
Using the HTML5 <canvas> element, I would like to load an image file (PNG, JPEG, etc.), draw it to the canvas completely transparently, and then fade it in. I have figured out how to load the image and draw it to the canvas, but I don't know how to change its opacity once it as been drawn.
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In a javascript array, how do I get the last 5 elements, excluding the first element?
...answered Jun 24 '11 at 21:18
SLaksSLaks
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PHP Fatal error: Call to undefined function json_decode()
... php5-json depending on the PHP version you're running)
Then of course make sure you restart Apache:
sudo service apache2 restart
Or if you are using PHP-FPM:
sudo service php7.2-fpm restart
(Or php7.1-fpm or php5-fpm)
Explanation
Debian has removed the previous JSON extension as of PHP 5....
Why does 0.ToString(“#.##”) return an empty string instead of 0.00 or at least 0?
...ered Jan 25 '12 at 11:03
Rich O'KellyRich O'Kelly
37.7k88 gold badges7575 silver badges107107 bronze badges
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When should I use jQuery's document.ready function?
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//No need to be put inside $(document).ready
$(document).on('click','a',function () {
})
// Need to be put inside $(document).ready if placed inside <head></head>
$('.container').on('click','a',function () {
});
EDIT
From comments,
$(document).ready does n...
Make copy of an array
...hich is constantly being updated. Let's say a = [1,2,3,4,5] . I need to make an exact duplicate copy of a and call it b . If a were to change to [6,7,8,9,10] , b should still be [1,2,3,4,5] . What is the best way to do this? I tried a for loop like:
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Reverting a single file to a previous version in git [duplicate]
...rent commits on a file.
Say I modified a file 5 times and I want to go back to change 2, after I already committed and pushed to a repository.
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Enum ToString with user friendly strings
... edited Sep 30 '16 at 13:05
Uwe Keim
35.7k3636 gold badges153153 silver badges255255 bronze badges
answered Jan 26 '09 at 11:01
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get list of pandas dataframe columns based on data type
...['A', 'E'], dtype('float64'): ['B'], dtype('O'): ['C', 'D']}
>>> {k.name: v for k, v in g.items()}
{'object': ['C', 'D'], 'int64': ['A', 'E'], 'float64': ['B']}
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Objective-C : BOOL vs bool
...r. You can use the (C99) bool type, but all of Apple's Objective-C frameworks and most Objective-C/Cocoa code uses BOOL, so you'll save yourself headache if the typedef ever changes by just using BOOL.
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