js判断数组对象或对象对象数组是否包含元素包含值 并获取下标

单纯判断是否包含

var arr = [
{
key:1,
name: '牛百叶'
},
{
key:2,
name: '虾滑'
}
];
// bool 为true说明数组中包含这个对象 为false则不包含
var bool1 = arr.some(item=> item.name == '虾滑')
var bool2 = arr.some(item=> item.name == '精品肥牛')
console.log(bool1) // true
console.log(bool2) // false

获取下标

var array = [1,2,3,'4'];
 
var indexOf4 = (array || []).findIndex((item) => item === '4');
 
console.log(indexOf4); // 3
var profiles= [
    {
      id: 'id123',
      name: "lin",
      age: 23
    },
    {
      id: 'id456',
      name: "lin2",
      age: 12
    },
    {
      id: 'id678',
      name: "lin3",
      age: 13
    }
];
 
var currentProfile = {
      id: 'id456',
      name: "lin2",
      age: 12
}; 
 
var currentProfileIndex = (profiles|| []).findIndex((profile) => profile.id === currentProfile .id);
console.log(currentProfileIndex );