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What does the exclamation mark do before the function?
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So what the author is doing is saving a byte per function expression; a more readable way of writing it would be this:
(function(){})();
Lastly, ! makes the expression return true. This is because by default all IIFE return undefined, which leaves us with !undefined which is true. Not particul...
What's the point of the X-Requested-With header?
...redirect step. It appears it also worked on Chrome, but is now remediated. More details here including different versions affected.
OWASP Recommend combining this with an Origin and Referer check:
This defense technique is specifically discussed in section 4.3 of
Robust Defenses for Cross-Sit...
In Django, how does one filter a QuerySet with dynamic field lookups?
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Transitions on the CSS display property
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You can concatenate two transitions or more, and visibility is what comes handy this time.
div {
border: 1px solid #eee;
}
div > ul {
visibility: hidden;
opacity: 0;
transition: visibility 0s, opacity 0.5s linear;
}
div:hover > ul {
v...
In Python, how do I determine if an object is iterable?
...ter() in our code as well for this purpose, but I've lately started to get more and more annoyed by objects which only have __getitem__ being considered iterable. There are valid reasons to have __getitem__ in a non-iterable object and with them the above code doesn't work well. As a real life examp...
Best way to remove from NSMutableArray while iterating?
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Beware that this could create bugs if objects are more than once in an array. As an alternative you could use an NSMutableIndexSet and -(void)removeObjectsAtIndexes.
– Georg Schölly
Jun 19 '09 at 20:47
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Asynctask vs Thread in android
... do not require downloading a lot of data
Disk-bound tasks that might take more than a few milliseconds
Use Java threads for:
Network operations which involve moderate to large amounts of data (either uploading or downloading)
High-CPU tasks which need to be run in the background
Any task where ...
How can Xcode 6 adaptive UIs be backwards-compatible with iOS 7 and iOS 6?
...t-Compact is not exported for iOS 7; Compact-Regular is. See my answer for more details.
– Dave DeLong
Sep 11 '14 at 19:26
2
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Python try-else
...block, so you should alway consider using this variant if you don't expect more exceptions in the else-block
– WorldSEnder
Aug 6 '14 at 11:56
3
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Trim last character from a string
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"Hello! world!".TrimEnd('!');
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EDIT:
What I've noticed in this type of questions that quite everyone suggest to remove the last char of given string. But this does not fulfill the definition of Trim method.
Trim - Removes all occurrences of
w...