問(wèn)題描述

JQuery 中有沒有像 PHP 一樣的 foreach 代碼?我在 php 中有一個(gè)代碼，比如

Is there a foreach code in JQuery as in PHP? I have a code in php,like

<?php foreach ($viewfields as $viewfield): ?>       
if("<?php echo $viewfield['Attribute']['required'];?>"=='true'){
       $("<span class='req'><em> * </em></span>").appendTo("#fb_contentarea_col1down21 #label<?php echo $viewfield['Attribute']['sequence_no']?>");
   }


   if(<?=$viewfield['Attribute']['type'];?>=='text'||<?=$viewfield['Attribute']['type'];?>=='date'||<?=$viewfield['Attribute']['type'];?>=='number'){ 
       $("<input id=input<?=$viewfield['Attribute']['sequence_no'];?> type= 'text' style= 'width:<?=$viewfield['Attribute']['size'];?>px' data-attr=<?=$viewfield['Attribute']['type'];?> ></input><br>").appendTo("#fb_contentarea_col1down21 #<?=$viewfield['Attribute']['sequence_no'];?>");
   }


   else if(<?=$viewfield['Attribute']['type'];?>=='textarea'){
       $("<textarea style= 'width:<?=$viewfield['Attribute']['size'];?>px' data-attr=<?=$viewfield['Attribute']['type'];?> id=input<?=$viewfield['Attribute']['sequence_no'];?>></textarea><br>").appendTo("#fb_contentarea_col1down21 #<?=$viewfield['Attribute']['sequence_no'];?>");
}

在 Jquery 中是否有任何等效的 foreach?如何在 jQuery 中實(shí)現(xiàn)同樣的功能?

Is there any equivalent of foreach in Jquery? How can I accomplish this same functioality in jQuery?

編輯 1:

我認(rèn)為它有效，但出現(xiàn)錯(cuò)誤.代碼和錯(cuò)誤信息如下.

I thought it worked but I get an error. The code and the error message is given below.

for(<?=$viewfield;?> in <?=$viewfields;?>){

 if("<?=$viewfield['Attribute']['required'];?>"=='true'){
            $("<span class='req'><em> * </em></span>").appendTo("#fb_contentarea_col1down21 #label<?php echo $viewfield['Attribute']['sequence_no']?>");
 }

 if(<?=$viewfield['Attribute']['type'];?>=='text'||<?=$viewfield['Attribute']['type'];?>=='date'||<?=$viewfield['Attribute']['type'];?>=='number'){ 
            $("<input id=input<?=$viewfield['Attribute']['sequence_no'];?> type= 'text' style= 'width:<?=$viewfield['Attribute']['size'];?>px' data-attr=<?=$viewfield['Attribute']['type'];?> ></input><br>").appendTo("#fb_contentarea_col1down21 #<?=$viewfield['Attribute']['sequence_no'];?>");
 }

 else if(<?=$viewfield['Attribute']['type'];?>=='textarea'){
            $("<textarea style= 'width:<?=$viewfield['Attribute']['size'];?>px' data-attr=<?=$viewfield['Attribute']['type'];?> id=input<?=$viewfield['Attribute']['sequence_no'];?>></textarea><br>").appendTo("#fb_contentarea_col1down21 #<?=$viewfield['Attribute']['sequence_no'];?>");
 }

}

錯(cuò)誤信息:

語(yǔ)法錯(cuò)誤for(在數(shù)組中)

syntax error for( in Array)

誰(shuí)能幫我..

推薦答案

$.each 功能類似.

它允許您使用可以訪問(wèn)每個(gè)項(xiàng)目的回調(diào)函數(shù)迭代數(shù)組:

It allows you to iterate arrays using a callback function where you have access to each item:

var arr = [ "one", "two", "three", "four", "five" ];


$.each(arr, function(index, value) {
  // work with value
});

知道也許有用，如果你想打破循環(huán)，你可以用 return false; 或者如果你只想跳過(guò)一次迭代(繼續(xù))，你 return真;

Maybe is useful to know, if you want to break the loop, you can do it with return false; or if you want to skip only one iteration (continue), you return true;

這篇關(guān)于foreach 相當(dāng)于 jquery 中的 php?的文章就介紹到這了，希望我們推薦的答案對(duì)大家有所幫助，也希望大家多多支持html5模板網(wǎng)！