rem

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: NSMutableArray * arrayTest ; -( void ) setContent { //must I call [array removeAllObjects]; ? arrayTest = [[ NSMutableArray alloc ] init ] [ arrayTest addObject :@ "str" ]; ... //add many objects } I call this function at different code snippet. do I need to removeAllObjects of arrayTest before , then alloc memory for arrayTest every time ? I use ARC . I don't want my app memory to increase every time I call this function. 回答1: No, what you have is fine. You don't need to call removeAllObjects under ARC or non-ARC. When the old

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have copied a classic asp website to the new Azure websites, and was trying to get it to connect to a remote MySQL database (remote being not hosted on Azure). I am getting a internal server error message, and the detailed logs seem to point to an issue with my connection string. The current string is setup as below: database_string = "Driver={mySQL ODBC 5.1 Driver}; Server=server.com; Port=3306; Option=0; Socket=; Stmt=; Database=mydb; Uid=user; Pwd=password;" and the ADODB connection is setup like such; Set area_rec = Server.CreateObject

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: What's the correct Maven environment variable name: MAVEN_HOME , MVN_HOME or M2_HOME ? I've found some details about MAVEN_HOME and M2_HOME here . But I also have seen MVN_HOME around. 回答1: I've personally never found it useful to set M2_HOME . What counts is your $PATH environment. Hijacking part of the answer from Danix, all you need is: export PATH=/Users/xxx/sdk/apache-maven-3.0.5/bin:$PATH The mvn script computes M2_HOME for you anyway for what it's worth. 回答2: Here is my Maven setup. You can use it as an example. You don't need

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am wanting to loop through folders within a subdirectory and combine all text files into one file. I found some answers online but none seems to work. Any help is much appreciated. I have provided what I've found below. In the example below the DummyFolder has multiple subdirectories that contain .txt files that need to be merged into 1 file. I got code 3 to work yesterday but somehow I changed something and it is no longer working for some reason. Code 1: @echo off set "header=C:\Users\user\Desktop\DummyFolder\Headings.txt" set "folder=C:

*/ /*--> */ /*--> */ /*--> */ /*--> */ 参考： https://www.w3cplus.com/mobile/lib-flexible-for-html5-layout.html 首先先弄清楚几个基本的原理知识： ：又称设备像素，是显示设备中一个最微小的物理部件； ：可认为是计算机坐标系统中的一个点，这个点代表一个可以由程序使用的虚拟像素(比如说CSS像素)，然后由相关系统转换为物理像素 设备像素比 = 物理像素 / 设备独立像素， 可通过js的window.devicePixelRatio获取，或css的-webkit-device-pixel-ratio ********ps： 1、安装fleible 2、在main.js引入 Import ‘lib-flexible’ 3、安装px2rem，使得我们在开发中不需要自己手动计算，照常写px npm install px2rem-loader --save-dev 4、在build目录下的utils.js修改配置 */ /*--> */ /*--> */ /*--> */ /*--> */ 重新开启项目， 750 设计稿，按设计稿来写 px； 注意要点：1、在index.html的头部，不要设置meta name=‘viewport‘； 个人看法：对于flexible适配方案，查阅源码

window . onload = function (){ getRem ( 750 , 100 ) }; window . onresize = function (){ getRem ( 750 , 100 ) }; function getRem ( pwidth , prem ){ var html = document . getElementsByTagName ( "html" )[ 0 ]; var oWidth = document . body . clientWidth || document . documentElement . clientWidth ; html . style . fontSize = oWidth / pwidth * prem + "px" ; } 文章来源: vue页面初始化大小rem，自适应效果设置

rem和em很容易混淆，其实两个都是css的单位，并且也都是相对单位，现有的em，css3才引入的rem，在介绍rem之前，我们先来了解下em em作为font-size的单位时，其代表父元素的字体大小，em作为其他属性单位时，代表自身字体大小――MDN 那么一个问题是：s1、s2、s5、s6的font-size和line-height分别是多少px < div class = "p1" > < div class = "s1" > 1 </ div > < div class = "s2" > 1 </ div > </ div > < div class = "p2" > < div class = "s5" > 1 </ div > < div class = "s6" > 1 </ div > </ div > .p1 {font-size: 16 px; line-height: 32 px;} .s1 {font-size: 2 em;} .s2 {font-size: 2 em; line-height: 2 em;} .p2 {font-size: 16 px; line-height: 2 ;} .s5 {font-size: 2 em;} .s6 {font-size: 2 em; line-height: 2 em;} 答案如下： p1： font-size

二、整体应用 一、常用Dos命令及例子 copy copy del rename strDestName.GetBuffer(0); move MD XCOPY MKDIR ') ); rd cd cmd exploer E:\work_svn\工作日志 Dir exist start /? REM dp0 %CD% Echo > set call 二 、整体应用 ------REM 设置宏、路径------- ------REM 拷贝需要的工具------- ------REM 编译代码，生成.so------- ------REM 解压文件夹 ---- if exist Rar.exe { } ------REM 编译库------- ------REM 编译发行版本------- ------REM------- ------REM------- ------REM------- ------REM------- ------REM------- ------REM------- ------REM------- ------REM------- 文章来源: 常用的DOS命令及例子

<!DOCTYPE html> <!--[if lt IE 7]> <html class="no-js lt-ie9 lt-ie8 lt-ie7"> <![endif]--> <!--[if IE 7]> <html class="no-js lt-ie9 lt-ie8"> <![endif]--> <!--[if IE 8]> <html class="no-js lt-ie9"> <![endif]--> <!--[if gt IE 8]><!--> < html class = "no-js" > <!--<![endif]--> < head > < meta charset = "utf-8" > < meta http-equiv = "X-UA-Compatible" content = "IE=edge" > < title > 实名认证 </ title > < meta name = "description" content = "" > < meta name = "viewport" content = "width=device-width, initial-scale=1" > < link rel = "stylesheet" href = "" > < style > * { margin : 0 ; padding : 0 ; } body {

自动生成跟字体大小;-----------------供参考!!! (function(baseFontSize, fontscale) { var _baseFontSize = baseFontSize || 100; var _fontscale = fontscale || 1; var win = window; var doc = win.document; var ua = navigator.userAgent; var matches = ua.match(/Android[\S\s]+AppleWebkit\/(\d{3})/i); var UCversion = ua.match(/U3\/((\d+|\.){5,})/i); var isUCHd = UCversion && parseInt(UCversion[1].split('.').join(''), 10) >= 80; var isIos = navigator.appVersion.match(/(iphone|ipad|ipod)/gi); var dpr = win.devicePixelRatio || 1; if (!isIos && !(matches && matches[1] > 534) && !isUCHd) { // 如果非iOS, 非Android4.3以上, 非UC内核