let tss = { members: [ { name: "wubzy", id: "4545", info: "stuff" }, { name: "slushie", id: "3434", info: "wow" }, { name: "kyusa", id: "6767", info: "e" }, { name: "swag", id: "8989", info: "xd" }, { name: "doge", id: "0101", info: "homks" }, { name: "vincent", id: "6666", info: "shrekt" } ], assignments: [] } let dm = []; let cm; let rm; let rm2; let mg; let asg = []; for (mg of dm) {asg.push({name: mg[0].id, assignedTo: mg[1].id});} tss.assignments = asg; console.log(tss);