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What's the scope of the “using” declaration in C++?
...Writing using std::string is never OK. Writing using ImplementationDetail::Foo in your own header, when that header declares ImplementationDetail::Foo can be OK, moreso if the using declaration happens in your namespace. E.g.
namespace MyNS {
namespace ImplementationDetail {
int Foo;
...
How to build query string with Javascript
...nd return the query parameters, eg: "var1=value&var2=value2&arr[]=foo&arr[]=bar..."
20 Answers
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What's the common practice for enums in Python? [duplicate]
...(names.split()):
setattr(self, name, number)
>>> foo = Enumeration("bar baz quux")
>>> foo.quux
2
You can also just use class members, though you'll have to supply your own numbering:
>>> class Foo(object):
bar = 0
baz = 1
quux...
'any' vs 'Object'
... of these functions, but it's a type error to call d with a primitive:
b("foo"); //Okay
c("foo"); //Okay
d("foo"); //Error: "foo" is a primitive
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How to execute IN() SQL queries with Spring's JDBCTemplate effectivly?
...s = new MapSqlParameterSource();
parameters.addValue("ids", ids);
List<Foo> foo = getJdbcTemplate().query("SELECT * FROM foo WHERE a IN (:ids)",
parameters, getRowMapper());
This only works if getJdbcTemplate() returns an instance of type NamedParameterJdbcTemplate
...
Git Alias - Multiple Commands and Parameters
...
No it won't. Git will transform git chs foo into git checkout && git status foo
– Lily Ballard
Sep 23 '11 at 20:13
...
What does $@ mean in a shell script?
...rameters passed to the script.
For instance, if you call ./someScript.sh foo bar then $@ will be equal to foo bar.
If you do:
./someScript.sh foo bar
and then inside someScript.sh reference:
umbrella_corp_options "$@"
this will be passed to umbrella_corp_options with each individual paramet...
How do I find where an exception was thrown in C++?
...error
throw std::runtime_error("RUNTIME ERROR!");
return 0;
}
int foo2() {
throw_exception();
return 0;
}
int foo1() {
foo2();
return 0;
}
int main(int argc, char ** argv) {
struct sigaction sigact;
sigact.sa_sigaction = crit_err_hdlr;
sigact.sa_flags = SA_RES...
How do I run two commands in one line in Windows CMD?
...is on all Microsoft OSes since 2000, and still good today:
dir & echo foo
If you want the second command to execute only if the first exited successfully:
dir && echo foo
The single ampersand (&) syntax to execute multiple commands on one line goes back to Windows XP, Windows 2...
What is std::move(), and when should it be used?
...er that you would like to continue considering the reference as an rvalue.
foo(3 * 5); // obviously, you are calling foo with a temporary (rvalue)
int a = 3 * 5;
foo(a); // how to tell the compiler to treat `a` as an rvalue?
foo(std::move(a)); // will call `foo(int&& a)` rather than `fo...