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How to order by with union in SQL?
...ed from the table. The point is that your header may very well be the same string as the name of the column from which you're selecting and this is the solution for using the label you want without it colliding in your union.
– Yevgeny Simkin
Oct 23 '17 at 6:36...
The easiest way to transform collection to array?
...of the correct type. And in this case, honestly, I wouldn't care about one extra single empty array in my application. That's far below noise level.
– Andreas Dolk
Jul 21 '10 at 6:28
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RAII and smart pointers in C++
...ance (and stealing an example from another answer):
void foo() {
std::string str;
// Do cool things to or using str
}
This works fine - but what if we want to return str? We could write this:
std::string foo() {
std::string str;
// Do cool things to or using str
return str;
}...
Using Rails 3.1, where do you put your “page specific” JavaScript code?
...I really like this solution. The only problem I have with it is that those extra manifests are not compressed/uglified. They are properly compiled though. Is there a solution or am I missing something?
– clst
Dec 8 '11 at 16:31
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URL encoding the space character: + or %20?
...form that uses +. So you're most likely to only see + in URLs in the query string after an ?.
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What is the difference between Scala's case class and class?
... the class, use case class. Otherwise use classes and also mentioning some extra perks like equals and hash code overriding. But are these the only reasons why one should use a case class instead of class?
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How can I sanitize user input with PHP?
...at you should do, to avoid problems, is quite simple: whenever you embed a string within foreign code, you must escape it, according to the rules of that language. For example, if you embed a string in some SQL targeting MySQL, you must escape the string with MySQL's function for this purpose (mysql...
How do I find all files containing specific text on Linux?
...d a way to scan my entire Linux system for all files containing a specific string of text. Just to clarify, I'm looking for text within the file, not in the file name.
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How do you access the matched groups in a JavaScript regular expression?
I want to match a portion of a string using a regular expression and then access that parenthesized substring:
22 Answers...
When do we need curly braces around shell variables?
...er, the {} in ${} are useful if you want to expand the variable foo in the string
"${foo}bar"
since "$foobar" would instead expand the variable identified by foobar.
Curly braces are also unconditionally required when:
expanding array elements, as in ${array[42]}
using parameter expansion oper...