例如我们有数字：

var arr1 =['aa','bb','cc','dd','ee','ff','gg','hh'];

var arr2 = [

{id:1,name:'lanyan'},

{id:2,name:'wanming'},

{id:3,name:'tingting'},

{id:4,name:'songsong'}

];

var arr2 = [

{id:1,name:'lanyan'},

{id:2,name:'wanming'},

{id:3,name:'tingting'},

{id:4,name:'songsong'},

'test',

'ethos'

];

一般我们是通过indexOf,findIndex获取数组的索引的

arr1.indexOf('bb')  //1

arr1.findIndex(function(data) {

return data == 'bb';

});

//输出索引1

但是如果一个数组里 包含对象，也包含字符串呢，这里有一个函数供参考

let getArrIndex =function(arr, obj) {

let index= null;

let key= Object.keys(obj)[0];

arr.every(function(value, i) {if (value[key] ===obj[key]) {

index=i;return false;

}return true;

});returnindex;

};

用法：

var getIndex = getArrIndex(arr2,{id:2,name:'wanming'});

//输出：1