大约有 13,000 项符合查询结果（耗时：0.0329秒） [XML]
C: Run a System Command and Get Output? [duplicate]
...
#include <stdio.h>
#include <stdlib.h>
int main( int argc, char *argv[] )
{
FILE *fp;
char path[1035];
/* Open the command for reading. */
fp = popen("/bin/ls /etc/", "r");
if (fp == NULL) {
printf("Failed to run command\n" );
exit(1);
}
/* Read the output a ...
Any equivalent to .= for adding to beginning of string in PHP?
...n assignment operator and no one commented on its usage for general string concatenation.
You may want to look into the use of the sprintf (documentation) family of functions for string concatenation.
It provides a lot more sanitization and usability than just combining two strings with assignment ...
How to avoid long nesting of asynchronous functions in Node.js
...e.slice.call(arguments);
return function() {
fun.apply(null, preArgs.concat.apply(preArgs, arguments));
};
};
Queue = [];
Queue.execute = function () {
if (Queue.length) {
Queue.shift()(Queue.execute);
}
};
...
What's the best way to check if a String represents an integer in Java?
... if (length == 0) {
return false;
}
int i = 0;
if (str.charAt(0) == '-') {
if (length == 1) {
return false;
}
i = 1;
}
for (; i < length; i++) {
char c = str.charAt(i);
if (c < '0' || c > '9') {
retu...
What is the worst gotcha in C# or .NET? [closed]
...Generic;
using System.Diagnostics;
class Test
{
static IEnumerable<char> CapitalLetters(string input)
{
if (input == null)
{
throw new ArgumentNullException(input);
}
foreach (char c in input)
{
yield return char.ToUpper(...
Why can't I use float value as a template parameter?
...
The current C++ standard does not allow float (i.e. real number) or character string literals to be used as template non-type parameters. You can of course use the float and char * types as normal arguments.
Perhaps the author is using a compiler that doesn't follow the current standard?
...
Why does SIGPIPE exist?
... answered Dec 3 '11 at 17:29
Charlie MartinCharlie Martin
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...
How to convert a Title to a URL slug in jQuery?
...i=0, l=from.length ; i<l ; i++) {
str = str.replace(new RegExp(from.charAt(i), 'g'), to.charAt(i));
}
str = str.replace(/[^a-z0-9 -]/g, '') // remove invalid chars
.replace(/\s+/g, '-') // collapse whitespace and replace by -
.replace(/-+/g, '-'); // collapse dashes
return str...
How to compare strings ignoring the case
...t; false
>> require 'active_support/all'
=> true
>> str1.mb_chars.downcase.to_s.casecmp(str2.mb_chars.downcase.to_s) == 0
=> true
It works this way in Ruby 2.3.1 and earlier versions.
For smaller memory footprint you can cherry pick string/multibyte:
require 'active_support'
re...
getMinutes() 0-9 - How to display two digit numbers?
...rent_date.getMinutes()).slice(-2);
The technique is take the rightmost 2 characters (slice(-2)) of "0" prepended onto the string value of getMinutes(). So:
"0"+"12" -> "012".slice(-2) -> "12"
and
"0"+"1" -> "01".slice(-2) -> "01"
...