AngularJS For 循环与数字 &范围

问题描述

Angular 确实为在其 HTML 指令中使用数字的 for 循环提供了一些支持:

做点什么

但是如果您的范围变量包含一个具有动态数字的范围，那么您每次都需要创建一个空数组.

在控制器中

var range = [];for(var i=0;i

在 HTML 中

做点什么

这行得通，但这是不必要的，因为我们根本不会在循环中使用范围数组.有谁知道为最小值/最大值设置范围或常规?

类似于:

做点什么

解决方案

我稍微调整了 这个答案 并提出使用这个小提琴.

过滤器定义为:

var myApp = angular.module('myApp', []);myApp.filter('range', function() {返回函数(输入，总计){总计 = parseInt(total);for (var i=0; i

像这样使用重复:

做点什么

Angular does provide some support for a for loop using numbers within its HTML directives:

<div data-ng-repeat="i in [1,2,3,4,5]">
  do something
</div>

But if your scope variable includes a range that has a dynamic number then you will need to create an empty array each time.

In the controller

var range = [];
for(var i=0;i<total;i++) {
  range.push(i);
}
$scope.range = range;

In the HTML

<div data-ng-repeat="i in range">
  do something
</div>

This works, but it is unnecessary since we won't be using the range array at all within the loop. Does anyone know of setting a range or a regular for min/max value?

Something like:

<div data-ng-repeat="i in 1 .. 100">
  do something
</div>

解决方案

I tweaked this answer a bit and came up with this fiddle.

Filter defined as:

var myApp = angular.module('myApp', []);
myApp.filter('range', function() {
  return function(input, total) {
    total = parseInt(total);

    for (var i=0; i<total; i++) {
      input.push(i);
    }

    return input;
  };
});

With the repeat used like this:

<div ng-repeat="n in [] | range:100">
  do something
</div>

这篇关于AngularJS For 循环与数字 &范围的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！