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What is the $? (dollar question mark) variable in shell scripting? [duplicate]
...able hold? I can't Google search the answer because they block punctuation characters.
9 Answers
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How to set java_home on Windows 7?
... @Aboozar Rajabi, You need " " if ... path contain a space char.
– Stéphane GRILLON
Aug 22 '16 at 8:18
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count (non-blank) lines-of-code in bash
...^\s*$', which is the beginning of a line, followed by 0 or more whitespace characters, followed by the end of a line (ie. no content other then whitespace), and display a count of matching lines (-c) instead of the matching lines themselves.
An advantage of this method over methods that involve pip...
How do I convert struct System.Byte byte[] to a System.IO.Stream object in C#?
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There's extra space allocated in the MemoryStream buffer by default (just like with e.g. a list). This can be dealt with easily by using the overload that allows you to set capacity, but is only really useful if you don't expect to w...
Best way to track onchange as-you-type in input type=“text”?
...n. If a user holds down a key, the event will only fire once for the first character. onkeypress fires whenever a char is added to the text field.
– fent
Mar 12 '12 at 17:22
62
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Remove elements from collection while iterating
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Old Timer Favorite (it still works):
List<String> list;
for(int i = list.size() - 1; i >= 0; --i)
{
if(list.get(i).contains("bad"))
{
list.remove(i);
}
}
Benefits:
It only iterates over the list once
No extra objects ...
When NOT to use Cassandra?
... time at 2 different ATMs, you will get 2 times $100, and a letter with an extra fee in your mail box. The bank earns money (the extra fee for being below the limit) by using inconsistent data. It's to hard to connect all ATMs in the world with each other through one large relational database. Can y...
Best way to determine user's locale within browser
...er and spits it back out as a JavaScript file with the header value in the string, eg.:
var acceptLanguage= 'en-gb,en;q=0.7,de;q=0.3';
then you could include a <script src> pointing at that external service in the HTML, and use JavaScript to parse the language header. I don't know of any ex...
How to insert element into arrays at specific position?
... @roelleor But be careful: "If the input arrays have the same string keys, then the later value for that key will overwrite the previous one. If, however, the arrays contain numeric keys, the later value will not overwrite the original value, but will be appended." - array_merge
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Are loops really faster in reverse?
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i-- is as fast as i++
This code below is as fast as yours, but uses an extra variable:
var up = Things.length;
for (var i = 0; i < up; i++) {
Things[i]
};
The recommendation is to NOT evaluate the size of the array each time. For big arrays one can see the performance degradation.
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