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Test if something is not undefined in JavaScript
... edited Jul 25 '17 at 20:10
gunwin
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answered Aug 12 '11 at 13:58
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PHP: How to remove all non printable characters in a string?
...the relative differences. Up to 512 chars, I was seeing preg_replace alway win. In the 1-8kb range, str_replace had a marginal edge.
I thought it was interesting result, so including it here. The important thing is not to take this result and use it to decide which method to use, but to benchmark ...
How to impose maxlength on textArea in HTML using JavaScript
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window.onload = function() {
var txts = document.getElementsByTagName('TEXTAREA');
for(var i = 0, l = txts.length; i < l; i++) {
if(/^[0-9]+$/.test(txts[i].getAttribute("maxlength"))) {
var func = functio...
一年手机淘汰上亿部 回收涌进一批“互联网+” - 资讯 - 清泛网 - 专注C/C++...
...亿部 回收涌进一批“互联网+”一提起手机回收，多数人的印象里总是一个小伙子蹲在路边，面前支起一个手写的小牌子，旁边摆着十几部二手手机，逢人就问：卖手机吗？现如今...一提起手机回收，多数人的印象里总是一个小...
MySQL一次主从数据不一致的问题解决过程 - 数据库(内核) - 清泛网 - 专注C/...
MySQL一次主从数据不一致的问题解决过程情况时这样的：昨天晚上主动2个机器都迁移了，然后今天才把主动重新连接上，但是从库的偏移量是从今天当前时刻开始的，也就是说虽然现在主...情况时这样的：
昨天晚上主动2个机器...
App Inventor 2 LLMAI2Ext 自研拓展：接入DeepSeek、Kimi、通义千问...等国...
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中文网开发国内大模型拓展的初衷
拓展下载，免费开放
DeepSeek
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Kimi
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阿里通义千问
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Unmangling the result of std::type_info::name
... 184647), clang 3.5 (trunk 202594) on Linux 64 bit and g++ 4.7.2 (Mingw32, Win32 XP SP2).
If you cannot use C++11 features, here is how it can be done in C++98, the file type.cpp is now:
#include "type.hpp"
#ifdef __GNUG__
#include <cstdlib>
#include <memory>
#include <cxxabi.h>
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Is there any particular difference between intval and casting to int - `(int) X`?
...1.7920589447 ms"
Looks like 7.1 optimized intval, and '1' + 0 is now the winner of this speed contest :) I'd still keep using intval anyway
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C#: why sign an assembly?
...g with not signing it?
No, it is not necessary but it is a mechanism allowing you to ensure the authenticity of an assembly. It allows you to ensure that an assembly hasn't been tampered with and indeed it origins from this author. It is also necessary if you want to put them into the GAC.
Wha...
Pure CSS to make font-size responsive based on dynamic amount of characters
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Would give 2 ups for this one. CSS solutions for the win!
– Mihkel L.
Feb 8 '14 at 13:59
37
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