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What should every JavaScript programmer know? [closed]
...same thing (so can you please stop using eval, thanks); that object properties are always strings (even for arrays); what for...in is for (and what it isn't).
Property-sniffing; what undefined is (and why it smells); why the seemingly-little-known in operator is beneficial and different from typeof/...
Non-static method requires a target
...ller action that works fine on Firefox both locally and in production, and IE locally, but not IE in production. Here is my controller action:
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How to avoid mysql 'Deadlock found when trying to get lock; try restarting transaction'
...ock when two transactions are trying to lock two locks at opposite orders, ie:
connection 1: locks key(1), locks key(2);
connection 2: locks key(2), locks key(1);
If both run at the same time, connection 1 will lock key(1), connection 2 will lock key(2) and each connection will wait for the other ...
HTML File Selection Event
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Note that in IE7 and 8 that the 'change' event doesn't bubble up to the form event. You need to put your listener on the <input> tag.
– xer0x
Jul 20 '11 at 18:07
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Maintain aspect ratio of div but fill screen width and height in CSS?
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Use the new CSS viewport units vw and vh (viewport width / viewport height)
FIDDLE
Resize vertically and horizontally and you'll see that the element will always fill the maximum viewport size without breaking the ratio and without scrollba...
Encode html entities in javascript
.../JavaScript/Reference/Global_Objects/String/charCodeAt
HTML Character entities - http://www.chucke.com/entities.html
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How to get all properties values of a JavaScript Object (without knowing the keys)?
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Be careful about the properties of the prototype object being inherited. See: hasOwnProperty()
– olive
Sep 21 '13 at 11:18
104
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How can I create a “Please Wait, Loading…” animation using jQuery?
...splay:none to make this hidden.
Then we position it in relation to the viewport window
with position:fixed. Width, height, top and left speak
for themselves. Background we set to 80% white with
our animation centered, and no-repeating */
.modal {
display: none;
position: fix...
Use images instead of radio buttons
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ok this is nice.. works great, apparently works on IE too, but actually it isn't. the image behaves correctly but when the form is submitted, there is no thumbnail selection. I guess i am using the new IE that comes with Win 8.1. Any idea?
– Junaid Rehma...
How do you clone a BufferedImage
...Image bi) {
ColorModel cm = bi.getColorModel();
boolean isAlphaPremultiplied = cm.isAlphaPremultiplied();
WritableRaster raster = bi.copyData(null);
return new BufferedImage(cm, raster, isAlphaPremultiplied, null);
}
sh...