大约有 45,000 项符合查询结果（耗时：0.0596秒） [XML]
Remove a string from the beginning of a string
...str($str, strlen($prefix));
}
Takes: 0.0369 ms (0.000,036,954 seconds)
And with:
$prefix = 'bla_';
$str = 'bla_string_bla_bla_bla';
$str = preg_replace('/^' . preg_quote($prefix, '/') . '/', '', $str);
Takes: 0.1749 ms (0.000,174,999 seconds) the 1st run (compiling), and 0.0510 ms (0.000,051,...
What is the correct way of using C++11's range-based for?
...lt;X> initialization ...]
Elements:
1 3 5 7 9
Without any spurious (and potentially expensive) copy constructor call.
So, when observing elements in a container (i.e., for read-only access),
the following syntax is fine for simple cheap-to-copy types, like int, double, etc.:
for (auto elem ...
How do I check if an integer is even or odd? [closed]
... if (x % 2)
printf("%d is odd\n", x);
return 0;
}
/* and.c */
#include <stdio.h>
int main(void)
{
int x;
for (x = 0; x < 10; x++)
if (x & 1)
printf("%d is odd\n", x);
return 0;
}
I then compiled these with gcc 4.1.3 on one of my m...
How to delete an item in a list if it exists?
...tting new_tag from a form text field with self.response.get("new_tag") and selected_tags from checkbox fields with
7...
Maximum number of threads per process in Linux?
...sys/kernel/threads-max
There is also a limit on the number of processes (and hence threads) that a single user may create, see ulimit/getrlimit for details regarding these limits.
share
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improve ...
How do I print bold text in Python?
... you didn't just did bold, but created a whole class for them to reference and to help all users viewing. Thank you.
– GreenHawk1220
Dec 9 '16 at 21:43
3
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How do I completely uninstall Node.js, and reinstall from beginning (Mac OS X)
My version of node is always v0.6.1-pre even after I install brew node and NVM install v0.6.19.
28 Answers
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Duplicate log output when using Python logging module
...
The problem is that every time you call myLogger(), it's adding another handler to the instance, which causes the duplicate logs.
Perhaps something like this?
import os
import time
import datetime
import logging
loggers = {}
def myLogger(name):
global loggers
if loggers.get(name):
...
How should one use std::optional?
I'm reading the documentation of std::experimental::optional and I have a good idea about what it does, but I don't understand when I should use it or how I should use it. The site doesn't contain any examples as of yet which leaves it harder for me to grasp the true concept of this object. When...
Removing first x characters from string?
...if one had a string lipsum , how would they remove the first 3 characters and get a result of sum ?
5 Answers
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