项目地址: https://github.com/mishoo/UglifyJS2
ubuntu下: sudo apt-get install node-uglify
// a.js
function test1(arg1,arg2){
console.log(arg1 + arg2);
}// 命令行运行
uglifyjs a.js >a.min.js// b.js 生成的压缩文件
function test1(a,b){console.log(a+b)};html部分<textarea data-adaptheight rows="3" cols="40" placeholder="Your input"
style="padding: 16px; line-height: 1.5;"></textarea>(function() {
function adjustHeight(textareaElement, minHeight) {
// compute the height difference which is caused by border and outline
var outerHeight = parseInt(window.getComputedStyle(el).height, 10);
var diff = outerHeight - el.clientHeight;
// set the height to 0 in case of it has to be shrinked
el.style.height = 0;
// set the correct height
// el.scrollHeight is the full height of the content, not just the visible part
el.style.height = Math.max(minHeight, el.scrollHeight + diff) + 'px';
}
// we use the "data-adaptheight" attribute as a marker
var textAreas = document.querySelectorAll('textarea[data-adaptheight]');
// iterate through all the textareas on the page
for (var i = 0, l = textAreas.length; i < l; i++) {
var el = textAreas[i];
// we need box-sizing: border-box, if the textarea has padding
el.style.boxSizing = el.style.mozBoxSizing = 'border-box';
// we don't need any scrollbars, do we? :)
el.style.overflowY = 'hidden';
// the minimum height initiated through the "rows" attribute
var minHeight = el.scrollHeight;
el.addEventListener('input', function() {
adjustHeight(el, minHeight);
});
// we have to readjust when window size changes (e.g. orientation change)
window.addEventListener('resize', function() {
adjustHeight(el, minHeight);
});
// we adjust height to the initial content
adjustHeight(el, minHeight);
}
}());示例：http://jsfiddle.net/5h4fauq8/1/
原文:http://web.jobbole.com/81906/
原文出自，可参考其具体实例 http://www.cnblogs.com/Hodor/archive/2012/07/25/2607831.html
// 固定顶部
$('#order-lefttitle').parent().parent().parent().scrollFix('top','top');
// 固定底部
$('#order-footerinfo').scrollFix('bottom','bottom');
;(function($) {
jQuery.fn.scrollFix = function(height, dir) {
height = height || 0;
height = height == "top" ? 0 : height;
return this.each(function() {
if (height == "bottom") {
height = document.documentElement.clientHeight - this.scrollHeight;
} else if (height < 0) {
height = document.documentElement.clientHeight - this.scrollHeight + height;
}
var that = $(this),
oldHeight = false,
p, r, l = that.offset().left;
dir = dir == "bottom" ? dir : "top"; //默认滚动方向向下
if (window.XMLHttpRequest) { //非ie6用fixed
function getHeight() { //>=0表示上面的滚动高度大于等于目标高度
return (document.documentElement.scrollTop || document.body.scrollTop) + height - that.offset().top;
}
$(window).scroll(function() {
if (oldHeight === false) {
if ((getHeight() >= 0 && dir == "top") || (getHeight() <= 0 && dir == "bottom")) {
oldHeight = that.offset().top - height;
that.css({
position: "fixed",
top: height,
left: l
});
}
} else {
if (dir == "top" && (document.documentElement.scrollTop || document.body.scrollTop) < oldHeight) {
that.css({
position: "static"
});
oldHeight = false;
} else if (dir == "bottom" && (document.documentElement.scrollTop || document.body.scrollTop) > oldHeight) {
that.css({
position: "static"
});
oldHeight = false;
}
}
});
} else { //for ie6
$(window).scroll(function() {
if (oldHeight === false) { //恢复前只执行一次，减少reflow
if ((getHeight() >= 0 && dir == "top") || (getHeight() <= 0 && dir == "bottom")) {
oldHeight = that.offset().top - height;
r = document.createElement("span");
p = that[0].parentNode;
p.replaceChild(r, that[0]);
document.body.appendChild(that[0]);
that[0].style.position = "absolute";
}
} else if ((dir == "top" && (document.documentElement.scrollTop || document.body.scrollTop) < oldHeight) || (dir == "bottom" && (document.documentElement.scrollTop || document.body.scrollTop) > oldHeight)) { //结束
that[0].style.position = "static";
p.replaceChild(that[0], r);
r = null;
oldHeight = false;
} else { //滚动
that.css({
left: l,
top: height + document.documentElement.scrollTop
})
}
});
}
});
};
})(jQuery);前端经常各种调试，有时候直接判断页面是否有滚动条能直接解决问题
4是滚动条边框所占像素
// 是否有竖向滚动条
if (document.documentElement.clientHeight < document.documentElement.offsetHeight-4){
//执行相关脚本。
}
// 是否有横向滚动条
if (document.documentElement.clientWidth < document.documentElement.offsetWidth-4){
//执行相关脚本。
｝// 发送邮件
function send($mails){
$to = 'a@a.com, b@b.com';
$title = '检查结果';
$content = "以下订单号有错误" . "\r\n";
$content .= "id:1,2,3";
$headers = "MIME-Version: 1.0" . "\r\n";
$headers .= "Content-type:text/html;charset=utf-8" . "\r\n";
$headers .= "From: system@system.com"; // 自定义
$r = mail($to, $title, $content, $headers);
var_dump($r);
}$subject = iconv('','GB2312','亲爱的'.$s_user.'，请取回您的密码！');Linux环境若不存在可能是没安装
sudo apt-get install sendmail然后就可以直接用 PHP 内置的mail()函数了
php.ini 配置[mail function]
; For Win32 only.
SMTP = smtp.126.com
#smtp_port = 25
; For Win32 only.
sendmail_from = jiangwei8909@126.com
; For Unix only. You may supply arguments as well (default: "sendmail -t -i ").
;sendmail_path =前三项对windows环境生效 sendmail_path对unix生效
其实也就是通过
microtime函数在前后个执行一下，计算时间差获取代码段的执行时间，测试效率
$runtime->stop();
echo $_b;
echo "页面执行时间: ".$runtime->spent()." 毫秒";
class runtime
{
var $StartTime = 0;
var $StopTime = 0;
function get_microtime()
{
list($usec, $sec) = explode(' ', microtime());
return ((float)$usec + (float)$sec);
}
function start()
{
$this->StartTime = $this->get_microtime();
}
function stop()
{
$this->StopTime = $this->get_microtime();
}
function spent()
{
return round(($this->StopTime - $this->StartTime) * 1000, 1);
}
}
原文出自开源中国