javascript - 如果数组长度大于 1 则运行代码

Question

我有 2 个对象数组。第一个里面有 1 个对象，第二个里面有 100 个。

Answer 1

Array.forEach 可以采用三个参数:

元素、索引、数组

尝试进入数组并检查其长度，如下所示:

var myItems = o.getAggregation("ooo")[0].getItems();
myItems.forEach(function(item, index, array){
    if(array.length > 1) {/*do whatever*/}
})

Here's引用和第一个示例显示您接受数组参数。

更新示例:

function demo(data) {
  data.forEach(function(item, index, array){
    if(array.length === 1) {
      console.log("Array with one element: ", array);
    } else {
      console.log("Array with three elements, so gets called thrice: ", array);
    }
  });
}

var myItems = ["1"];
demo(myItems);
myItems = ["1","2","3"];
demo(myItems);

输出如下:

Array with one element:  [ '1' ]
Array with three elements, so gets called thrice:  [ '1', '2', '3' ]
Array with three elements, so gets called thrice:  [ '1', '2', '3' ]
Array with three elements, so gets called thrice:  [ '1', '2', '3' ]