大约有 13,000 项符合查询结果（耗时：0.0273秒） [XML]
Identify if a string is a number
...$")
If you just want to know if it has one or more numbers mixed in with characters, leave off the ^ + and $.
Regex.IsMatch(input, @"\d")
Edit:
Actually I think it is better than TryParse because a very long string could potentially overflow TryParse.
...
How to search a Git repository by commit message?
...Cgreen%H %Cblue%s\n%b%Creset\" --name-status --grep. Note the --all and %b chars. Thx @AshleyCoolman for the reset tip.
– arcol
Feb 22 '16 at 14:27
1
...
Remove duplicate values from JS array [duplicate]
... a = [],
LEN = 1000,
LOOPS = 1000;
while(LEN--)
a = a.concat(r);
var d = new Date();
for(var i = 0; i < LOOPS; i++)
uniq(a);
document.write('<br>uniq, ms/loop: ' + (new Date() - d)/LOOPS)
var d = new Date();
for(var i = 0; i < LOOPS; i++)
uniq_fast...
Haskell: Lists, Arrays, Vectors, Sequences
...st. The best example of lists screwing up performance tends to come from [Char] which the prelude has aliased as String. Char lists are convient, but tend to run on the order of 20 times slower than C strings, so feel free to use Data.Text or the very fast Data.ByteString. I'm sure there are othe...
How to manually expand a special variable (ex: ~ tilde) in bash
...safer and better solutions. Preferably, I'd go with either of these two:
Charle's Duffy's solution
Håkon Hægland's solution
Original answer for historic purposes (but please don't use this)
If I'm not mistaken, "~" will not be expanded by a bash script in that manner because it is treated a...
Why don't structs support inheritance?
...hat short[] can't be converted to int[] (short of conversion code, like 'a.Select(x => (int) x).ToArray()'). If the runtime disallowed the cast from Base to Derived, it would be a "wart", as that IS allowed for reference types. So we have two different "warts" possible -- forbid struct inherita...
Java how to replace 2 or more spaces with single space in string and delete leading and trailing spa
...pace - it just hides it by moving the start and end values. The underlying char[] remains unchanged.)
– corsiKa
May 28 '10 at 21:02
2
...
Extract file basename without path and extension in bash [duplicate]
...til item #7 below).
1st pattern: *\/ matches anything before a literal "/" char.
pattern separator | which in this instance acts like a logical OR.
2nd pattern: .* matches anything after a literal "." -- that is, in bash the "." is just a period char, and not a regex dot.
) end pattern list.
} end ...
How do I assign an alias to a function name in C++?
...
typedef int (*printf_alias)(const char*, ...);
printf_alias holler = std::printf;
Should do you fine.
share
|
improve this answer
|
...
How do I check OS with a preprocessor directive?
...eturn a name of platform, if determined, otherwise - an empty string
const char *get_platform_name() {
return (PLATFORM_NAME == NULL) ? "" : PLATFORM_NAME;
}
int main(int argc, char *argv[]) {
puts(get_platform_name());
return 0;
}
Tested with GCC and clang on:
Debian 8
Windows (Min...