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How do I wait for an asynchronously dispatched block to finish?
...if (![NSThread isMainThread]) {
dispatch_semaphore_wait(sema, DISPATCH_TIME_FOREVER);
} else {
while (dispatch_semaphore_wait(sema, DISPATCH_TIME_NOW)) {
[[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode beforeDate:[NSDate dateWithTimeIntervalSinceNow:0]];
}
}
This sho...
How do I sort a list of dictionaries by a value of the dictionary?
... sorted using timsort which is stable, you can call sorted several times to have a sort on several criteria
– njzk2
May 29 '13 at 13:41
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Pretty printing XML with javascript
...ook at the date of the answer, the Chrome browser was non-existent at that time.
– Dimitre Novatchev
Jan 25 '11 at 4:38
3
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How to reload a clojure file in REPL
...ure.tools.namespace.repl. Subsequent calls to (refresh) will give you a RuntimeException, "Unable to resolve symbol: refresh in this context." Probably the best thing to do is to either (require 'your.namespace :reload-all), or, if you know you're going to want to refresh your REPL a lot for a given...
How to timeout a thread
I want to run a thread for some fixed amount of time. If it is not completed within that time, I want to either kill it, throw some exception, or handle it in some way. How can it be done?
...
Determine the number of lines within a text file
...much memory as the size of the file. The second merely loops one line at a time so it never has to allocate more than one line's worth of memory at a time. This isn't that important for small files, but for larger files it could be an issue (if you try and find the number of lines in a 4GB file on a...
MySQL SELECT WHERE datetime matches day (and not necessarily time)
I have a table which contains a datetime column. I wish to return all records of a given day regardless of the time. Or in other words, if my table only contained the following 4 records, then only the 2nd and 3rd would be returned if I limit to 2012-12-25.
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Regex: match everything but specific pattern
...
That's true, but it only processes one character at a time. If you want to exclude a sequence of two or more characters, you have to use negative lookahead like the other responders said.
– Alan Moore
Jul 20 '13 at 10:42
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jquery - fastest way to remove all rows from a very large table
...(child) syntax is faster than $(target > child). Why? Sizzle!
Elapsed Time to Empty 3,161 Table Rows
Using the Detach() method (as shown in my example above):
Firefox: 0.027s
Chrome: 0.027s
Edge: 1.73s
IE11: 4.02s
Using the empty() method:
Firefox: 0.055s
Chrome: 0.052s
Edge: 137.99s ...
What is a None value?
...ker has a unique name written on it, and it can only be on one object at a time, but you could put more than one sticker on the same object, if you wanted to. When you write
F = "fork"
you put the sticker "F" on a string object "fork". If you then write
F = None
you move the sticker to the N...