Tengo esta matriz simplificada de objetos.
var items = [{"function":"function_1","process":"process_1"}, {"function":"function_1","process":"process_2"}, {"function":"function_1","process":"process_3"}, {"function":"function_2","process":"process_3"}, {"function":"function_2","process":"process_4"}]que quiero mapear en JS de acuerdo con las claves en la siguiente matriz:
result = [ { "function":"function_1", "process": [ "process_1", "process_2" ] }, { "function":"function_2", "process": [ "process_3", "process_4" ] } ]Dedicado a ti amigo
var items = [{"function":"function_1","process":"process_1"}, {"function":"function_1","process":"process_2"}, {"function":"function_1","process":"process_3"}, {"function":"function_2","process":"process_3"}, {"function":"function_2","process":"process_4"}] var arr2 = items.reduce( (a,b) => { var i = a.findIndex( x => x.function === b.function); return i === -1 ? a.push({ function : b.function, process : [b.process] }) : a[i].process.push(b.process), a; }, []); console.log(arr2) var items = [{ "function": "function_1", "process": "process_1" }, { "function": "function_1", "process": "process_2" }, { "function": "function_1", "process": "process_3" }, { "function": "function_2", "process": "process_3" }, { "function": "function_2", "process": "process_4" }] var uniqueFunctionList = [] // to keep track of unique function names var resultArr = [] items.forEach(item => { if (!uniqueFunctionList.includes(item.function)) { // item object doesnt exist uniqueFunctionList.push(item.function) // add unique function name let tmp_obj = {} tmp_obj['function'] = item.function // item is unique just push it tmp_obj['process'] = [item.process] // make process array via [] resultArr.push(tmp_obj) } else { // function name is not unique resultArr.forEach(result => { // it is available in resultArr if (result.function == item.function) { // find the function result.process.push(item.process) // push to process array } }) } }) console.log(resultArr)