programming
Summary of common methods of javascript array
Summary of data commonly used methods forEach traverse the array let arr = [ 15 , 26 , 23 , 10 , 9 , 6 , 78 , 21 , 24 , 10 , 9 ]; arr.forEach( ( item, index ) => { console .log( "The value is" + item, "The subscript is" + index); }); Value is 15 Subscript is 0 Value is 26 Subscript is 1 Value is 23 Subscript is 2 Value is 10 Subscript is 3 Value is 9 Subscript is 4 Value is 6 Subscript is 5 Value is 78 Subscript is 6 value is 21 subscripted 7 value 24 subscripted 8 value 10 subscripted 9 valu