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Remove all files except some from a directory
When using sudo rm -r , how can I delete all files, with the exception of the following:
19 Answers
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JavaScript seconds to time string with format hh:mm:ss
... = "0"+seconds;}
return hours+':'+minutes+':'+seconds;
}
You can use it now like:
alert("5678".toHHMMSS());
Working snippet:
String.prototype.toHHMMSS = function () {
var sec_num = parseInt(this, 10); // don't forget the second param
var hours = Math.floor(sec_num / 3600);
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MIN/MAX vs ORDER BY and LIMIT
...the better one? What are your reasons (code efficiency, better maintainability, less WTFery)...
5 Answers
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PHP Constants Containing Arrays?
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NOTE: while this is the accepted answer, it's worth noting that in PHP 5.6+ you can have const arrays - see Andrea Faulds' answer below.
You can also serialize your array and then put it into the constant:
# define constant, serialize array
define ("FRUITS", seria...
How to check if std::map contains a key without doing insert?
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Use my_map.count( key ); it can only return 0 or 1, which is essentially the Boolean result you want.
Alternately my_map.find( key ) != my_map.end() works too.
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When would you call java's thread.run() instead of thread.start()?
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You might want to call run() in a particular unit test that is concerned strictly with functionality and not with concurrency.
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HTML img tag: title attribute vs. alt attribute?
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I'd go for both. Title will show a nice tooltip in all browsers and alt will give a description when browsing in a browser with no images.
That said, I'd love to see some stats of how many "surfers" out there going to a "store" to browse merc...
How to check if a word is an English word with Python?
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For (much) more power and flexibility, use a dedicated spellchecking library like PyEnchant. There's a tutorial, or you could just dive straight in:
>>> import enchant
>>> d = enchant.Dict("en_US")
>>> d.check("Hello")
True
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How does Zalgo text work?
I've seen weirdly formatted text called Zalgo like below written on various forums. It's kind of annoying to look at, but it really bothers me because it undermines my notion of what a character is supposed to be. My understanding is that a character is supposed to move horizontally across a line an...
What is the fastest substring search algorithm?
...sound like an idiot I'm going to state the problem/requirements more explicitly:
18 Answers
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