I have this simplified array of objects
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"}]
that I want to map in JS according to the keys into the following array:
result = [
{
"function":"function_1",
"process": [
"process_1",
"process_2"
]
},
{
"function":"function_2",
"process": [
"process_3",
"process_4"
]
}
]
Dedicated to you my friend
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)