each | 易学教程

PHP数组

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数组，可以说是PHP的数据应用中较重要的一种方式。PHP的数组函数众多，下面是一些小结，借此记之，便于以后鉴之。 1. 数组定义数组的定义使用 array()方式定义，可以定义空数组： <?php $number = array(1,3,5,7,9); $result = array();//定义空数组 $color =array("red","blue","green"); $language = array(1=>"English",3=>"Chinese",5=>"Franch");//自定义键值 $two = array( "color"=>array("red","blue"), //用逗号结尾　　"week"=>array("Monday","Friday") //最后一句没有标点 );//定义二维数组 ?> 2. 创建数组 2.1、array compact ( mixed $varname [, mixed $... ] ) 　　将一个或多个变量（包含数组）转换为数组 <?PHP $number = "1,3,5,7,9"; $string = "I'm PHPer"; $array = array("And","You?"); $newArray = compact("number","string","array"); print_r ($newArray)

Chain ajax and execute it in sequence. Jquery Deferred

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问题 I have 3 processes that needs ajax to complete. But it is asynchronous and it fails to do what I wanted to do.. Lets say: function a(param1, param2) { $.post(..., function(result){ if(result){ b(); } else { console.log("failed a"); } }) } function b() { $.post(..., function(result){ if(result){ c(); } else { console.log("failed b"); } }) } function c() { $.post(..., function(result){ if(result){ console.log("successful"); } else { console.log("failed b"); } }) } I want it to execute like this

Return a value when using jQuery.each()?

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问题 I want to return false and return from function if I find first blank textbox function validate(){ $('input[type=text]').each(function(){ if($(this).val() == "") return false; }); } and above code is not working for me :( can anybody help? 回答1: You are jumping out, but from the inner loop, I would instead use a selector for your specific "no value" check, like this: function validate(){ if($('input[type=text][value=""]').length) return false; } Or, set the result as you go inside the loop,

Java中for each与正常for循环效率对比

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循环ArrayList时，普通for循环比foreach循环花费的时间要少一点；循环LinkList时，普通for循环比foreach循环花费的时间要多很多。当我将循环次数提升到一百万次的时候，循环ArrayList，普通for循环还是比foreach要快一点；但是普通for循环在循环LinkList时，程序直接卡死。结论：需要循环数组结构的数据时，建议使用普通for循环，因为for循环采用下标访问，对于数组结构的数据来说，采用下标访问比较好。需要循环链表结构的数据时，一定不要使用普通for循环，这种做法很糟糕，数据量大的时候有可能会导致系统崩溃。原因：foreach使用的是迭代器可以下标访问时，使用for，不能下标访问，需要指针访问时，使用for each。来源： https://www.cnblogs.com/feicheninfo/p/9679110.html

How to add pause between each iteration of jQuery .each()?

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问题 I'm grabbing an array of jQuery objects and then via .each() modifying each individual jquery with in the array. In this case I'm updated the class names to trigger a -webkit-transition-property to utilize a css transition. I'd like there to be a pause before each css transition begins. I'm using the following, but there is no delay in between each update. Instead, they all appear to be updating at once. function positionCards() { $cards = $('#gameboard .card'); $cards.each(function() {

字典与集合（Dictionary与Collection）

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Dictionary对象将替换Collection对象，并提供附加的语言从而使增加和删除记录的速度比以前提高三倍虽然Visual Basic 6.0只有很少的新特点，但是具有某些功能强大的新的对象模型，其中之一就是Dictionary对象。 Dictionary对象是无处不在的Visual Basic Collection对象的新版本。它的介绍存在于VBScript 2.0，并通过Visual Basic 6.0 对Scripting Runtime Library的支持涉入Visual Basic的全部内容。刚开始，Dictionary对象仅仅包含在VBScript中，并作为 Perl相关内容的等价体对Web组请求进行答复。与Collection对象相似，你能够通过Dictionary存储任何类型的数据或字典对象，这些数据和对象通常被看作字典的组成部分，每一部分都被赋予字符串型键值。虽然我不认为Microsoft意图使你完全摆脱收集和替换上述数据和对象的烦恼，但是实际上，在先前的Visual Basic 6.0文档中，对Dcitionary对象确实很少提及，因此我认为这是Visual Basic 6.0的一个最新的重要特点。 Dictionary对象与Collection对象的比较从Visual Basic 4.0开始

Restart jQuery.each() after loop ends

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问题 I have array of values and i want to set those values as placeholders to my input. How to achieve this using jQuery.each() only because i solved my issue with this solution and it works perfectly. I tried doing this to restart it but it's not working: if(index==arr.length) index=0; HTML code: Values : <input name='input' id='input' /> JS/jQuery code: var arr = new Array(); for (var i = 0; i <= 5; i++) { arr.push('Value ' + i);//fill array with values } function eachChange(){ var x=0; $.each

jQuery - Adding classes to elements inside array with delay

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问题 I have an array that contains some elements from my page. Now I need a function that literates through the array and adds a class bold to each element. The problem is that once the class is added, some time has to pass. Then bold has to be removed and needs to be applied to the next element, resulting in a "wave" motion. I've tried to do it like this: $.each(tdArr, function(i, v) { v.addClass("bold"); setTimeout(function(){ v.removeClass("bold"); }, 900) }) The problem with that code is that

How to add polylines with an array of position?

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问题 I have a simple array containing name of cities. I'm trying to loop through this array and add markers linked by Polylines on the Google Map. Here is my code: function addMarkerCity(cities) { $.each(cities, function(index, value) { geocoder.geocode({'address': value}, function(results, status) { if (status == google.maps.GeocoderStatus.OK) { var cityPosition = results[0].geometry.location; flightRoute.push(cityPosition); var currentMarker = map.addMarker({ position: cityPosition }); }); }); }

How to run the powershell code against each subfolder that is in the IIS root directory?

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问题 I would like to run the powershell code below, against each sub-folder that is in the IIS root directory. The output should be separate .htm file for each sub-folder contents (containing only the files in that sub-folder). If you need me to clarify my question, just ask. $basedir = 'c:\inetpub\wwwroot' $exp = [regex]::Escape($basedir) $server = 'http://172.16.246.76' function Create-HtmlList($fldr) { Get-ChildItem $fldr -Force | select ... ... } | Set-Content "$fldr.htm" } # list files in