Tagged: concat

javascript 0

push vs concat vs spread

push, con­cat and spread all of them are object/array manip­u­la­tion meth­ods. push — mutates the orig­i­nal data var a = [1, 2, 3]; a.push(9); // returns 4 console.log (a); // [1, 2, 3, 9] concat…