js便利语法

数组类遍历

var arr = ["11", "22", "app", "desk"];

var arr_obj = [
    {
        age: 19,
        name: "liuhf2"
    }, {
        age: 20,
        name: "liuhf1"
    },
    {
        age: 13,
        name: "liuhf000"
    }
];

var obj={
    name:"hai",
    working:"coding",
    age:19,
}


var includes_res = arr.includes["desk"]

var some_res=arr_obj.some((item)=>{return item.age>19});

var every_res=arr_obj.every((item)=>{return item.age>19});

var arr_keys=Object.keys(arr);

var obj_keys=Object.keys(obj);

console.log("includes_res", includes_res);

console.log("some_res", some_res);

console.log("every_res", every_res);

console.log("arr_keys", arr_keys);

console.log("obj_keys", obj_keys);