Update an array into filter a new array

October 29, 2022

Having a array values of the below need to convert another form of array using typescript or javascript.

arrayList = {
['p1', 'm1', 0], 
['p1', 'm2', 2], 
['p1', 'm3', 3], 
['p2', 'm2', 3], 
['p2', 'm3', 5], 
['p3', 'm1', 3],
['p3', 'm2', 4]}

new array need to check with first element of array

array2 = { [ panel: 'p1', content: {['m1',0], ['m2', 2], ['m3', 3]}],
[ panel: 'p2', content: {['m2', 3], ['m3', 5]}],
[ panel: 'p3', content: {['m1', 3], ['m2', 4]}]  }

Thanks in advance

>Solution :

As I said in the comment,both arrayList and array2 are not in valid json format.

If changed them to valid json format such as below

let arrayList = [
['p1', 'm1', 0], 
['p1', 'm2', 2], 
['p1', 'm3', 3], 
['p2', 'm2', 3], 
['p2', 'm3', 5], 
['p3', 'm1', 3],
['p3', 'm2', 4]
]

array2 = { [ panel: 'p1', content: [['m1',0], ['m2', 2], ['m3', 3]]],
[ panel: 'p2', content: [['m2', 3], ['m3', 5]]],
[ panel: 'p3', content: [['m1', 3], ['m2', 4]]]  }

then you can use below code to do it

let arrayList = [
['p1', 'm1', 0], 
['p1', 'm2', 2], 
['p1', 'm3', 3], 
['p2', 'm2', 3], 
['p2', 'm3', 5], 
['p3', 'm1', 3],
['p3', 'm2', 4]
]

let result = arrayList.reduce((a,c) =>{
  let obj = a.find(i => i.panel == c[0])
  if(obj){
    obj.content.push(c.slice(1))
   }else{
    obj ={'panel':c[0],'content':[c.slice(1)]}
    a.push(obj)
   }
  return a
},[])

console.log(result)