大约有 43,000 项符合查询结果（耗时：0.0332秒） [XML]
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
...
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 $.
Regex.IsMatch(input, @"\d")
Edit:
Actually I think it is better than TryParse because a very long string could potentially overflow TryParse.
...
Getting MAC Address
...8927, struct.pack('256s', ifname[:15]))
return ':'.join(['%02x' % ord(char) for char in info[18:24]])
print getHwAddr('eth0')
This is the Python 3 compatible code:
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import fcntl
import socket
import struct
def getHwAddr(ifname):
s = socke...
PHP Array to CSV
...ng:
function array2csv($data, $delimiter = ',', $enclosure = '"', $escape_char = "\\")
{
$f = fopen('php://memory', 'r+');
foreach ($data as $item) {
fputcsv($f, $item, $delimiter, $enclosure, $escape_char);
}
rewind($f);
return stream_get_contents($f);
}
$list = array ...
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...
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...
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
...
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 ...
Reasons for using the set.seed function
...
The char2seed function in the TeachingDemos package allows you to set the seed (or choose a seed to pass into set.seed) based on a character string. For example you could have students use their name as the seed then each studen...
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...