jquery - 如何从每个语句中退出（中断函数）？
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jquery - how to exit (break function) from each statement?
提问by joshua
for example I use following code:
例如我使用以下代码：
$("img").each(function(i){
x += $("img:eq(" + i ")").width();
if(some conditional) return;
});
after return I would like to not adding anything to x, how could I achieve it?
返回后我不想向 x 添加任何内容，我该如何实现？
回答by Andy McCluggage
From the JQuery doco...
从JQuery 文档...
We can break the $.each() loop at a particular iteration by making the callback function return false. Returning non-false is the same as a continue statement in a for loop; it will skip immediately to the next iteration.
我们可以通过使回调函数返回 false 来在特定迭代中中断 $.each() 循环。返回非 false 与 for 循环中的 continue 语句相同；它将立即跳到下一次迭代。
So essentially this means...
所以基本上这意味着......
return false;= break;
return false;= break;
return true;or return;= continue;
return true;或return;=continue;
回答by Matthew Flaschen
You can return falseto cause eachto stop calling the function. However, a regular loop and a break statement might be clearer.
您可以return false导致each停止调用该函数。但是，常规循环和 break 语句可能更清晰。
