由网友(深情.)分享简介：比方说我有以下的code（伪）：Say for example I have the following code (pseudo):{{ $index }}其结果将是1 2 3 4 5 6 ... 我怎么能去改变以上，这样的指标印在code How co...

比方说我有以下的code（伪）：

Say for example I have the following code (pseudo):

<div ng-repeat=range>{{ $index }}</div>

其结果将是

1 2 3 4 5 6 ...

我怎么能去改变以上，这样的指标印在code

How could I go about changing the code above so that the indexes are printed

001 002 003 004 005 006 ？ （这样的索引打印为3位）

001 002 003 004 005 006? (so that the index is printed as 3 digits)

推荐答案

您可以很容易地过滤器做pretty。

You could do this pretty easily with a filter.

首先，定义它像这样：

myModule.filter("tripleDigit", function() {
  return function(number) {
    if (number !== null && number !== undefined) {
      var str = "" + number;
      while (str.length < 3) str = "0" + str;
      return str;
    }
  };
});

然后你可以管 $指数到它：

<div ng-repeat=range>{{ $index | tripleDigit }}</div>

下面是它定义了一个名为垫过滤器，可以让你在多少位数字垫作为参数传递一个例子：的 http://jsfiddle.net/BinaryMuse/64ycY/

Here's an example that defines a filter called pad that allows you to pass in how many digits to pad as an argument: http://jsfiddle.net/BinaryMuse/64ycY/