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);