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Iterate over two arrays and return an array of objects


By : Mohamed Hadj Aissa
Date : October 16 2020, 06:10 PM
hope this fix your issue There's no need for Object.defineProperty/defineProperties, you can just create the objects with initializer (aka "literal") syntax in a map callback:
code :
const result = arr1.map((Name, index) => ({Id: arr2[index], Name}));
const result = arr1.map((name, index) => ({id: arr2[index], name}));
const arr1 = ["Bob Jones", "Steven Simon", "Green Tea"];
const arr2 = [10, 8, 13];
const result = arr1.map((name, index) => ({id: arr2[index], name}));
console.log(result);
.as-console-wrapper {
  max-height: 100% !important;
}
var result = arr1.map(function(name, index) {
    return {id: arr2[index], name: name};
});
var arr1 = ["Bob Jones", "Steven Simon", "Green Tea"];
var arr2 = [10, 8, 13];
var result = arr1.map(function(name, index) {
    return {id: arr2[index], name: name};
});
console.log(result);
.as-console-wrapper {
  max-height: 100% !important;
}


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Iterate over array of objects and concatenate their attributes which are arrays themselves


By : mogal mahin
Date : March 29 2020, 07:55 AM
Hope that helps I have an array of objects that have an array as attribute. I want to concatenate these attributes. I'm doing this: , You need to use Array#map :-
code :
result = objects.map { |obj| obj.attr }
result = objects.flat_map { |obj| obj.attr }

What's the efficient way to iterate through 2 arrays of Objects and return a single array of objects?


By : user2629189
Date : March 29 2020, 07:55 AM
I hope this helps . You can use reduce and find
code :
const exercises = [{id: 'pull-ups',title: 'Pull Ups',description: 'Back and biceps exercise...',muscles: 'back'},
{id: 'deadlifts',title: 'Deadlifts',description: 'Back and leg exercise...',muscles: 'back'},
{id: 'squats',title: 'Squats',description: 'Legs exercise...',muscles: 'legs'}]

const searchResult = [{id: 'overhead-press',title: 'Overhead Press',description: 'Delts exercise...',muscles: 'shoulders'},
{id: 'dips',title: 'Dips',description: 'Triceps exercise...',muscles: 'arms'},
{id: 'barbell-curls',title: 'Barbell Curls',description: 'Biceps exercise...',muscles: 'arms'},
{id: 'bench-press',title: 'Bench Press',description: 'Chest exercise...',muscles: 'chest'},
{id: 'pull-ups',title: 'Pull Ups',description: 'Back and biceps exercise...',muscles: 'back'},
{id: 'deadlifts',title: 'Deadlifts',description: 'Back and leg exercise...',muscles: 'back'},
{id: 'squats',title: 'Squats',description: 'Legs exercise...',muscles: 'legs'}]

let op = searchResult.reduce((op,inp) => {
  let add = exercises.find(e=> e.id === inp.id)
  if(!add){
    op[inp.id] = inp
  }
  return op
},{})

console.log(Object.values(op))

es6 iterate through an array of objects with nested arrays and return a single array?


By : dexrishi
Date : March 29 2020, 07:55 AM
it fixes the issue Array reduce might be a better option than map.
code :
let array = [{
    name: "name01", 
    arr: [
      {name: "inner01"}, 
      {name: "inner02"}, 
      {name: "inner03"}
    ]
  }, {
    name: "name02", 
    arr: [
      {name: "inner04"}, 
      {name: "inner05"}, 
      {name: "inner06"}
    ]
  }
]

let convo = array.reduce((a, {name, arr}) => a.concat([{name}], arr), []);
console.log(convo)

Iterate through 2 arrays containing objects and return the values of a second array using the first arrays keys


By : user3163100
Date : March 29 2020, 07:55 AM
help you fix your problem I'm trying to user .map() to map over 2 arrays and return a result array with new keys and values using existing keyvalues of arr1 , arr1 contains mapped fields and headers
code :
var arr1 = [
    {"name":"orange","mappedHeader":"dollar"},
    {"name":"apple","mappedHeader":"coin"}
];
var arr2 = [
    {"orange":"red","pumpkin":"white","apple":"yellow", "plum":"green"},
    {"orange":"pink","pumpkin":"brown","apple":"gold","plum":"blue"},
];
//var whatIWant = [
//    {"dollar":"red", "coin":"yellow"},
//    {"dollar":"pink", "coin","gold"}
//];

var whatIWant = arr2.map(item=>{ /* Step 1*/
    let obj = {};
    arr1.forEach((v,i,a)=>obj[v.mappedHeader] = item[v.name]); /* Step 2 */
    return obj; /* Step 3 */
})

Iterate through an array of objects with deep nested objects and arrays


By : user3520741
Date : March 29 2020, 07:55 AM
To fix this issue If the aim is to make this JSON into an object then the best solution is to parse the JSON. For example:
code :
let myJson = "[
  {
    "name": "Collection 1",
  },
  {
    "name": "Collection 2",
  },
  {
    "name": "Collection 3",
  }
]"
let myObj = JSON.parse(myJson);
for(let i = 0; i < myObj.length; i++){
  console.log(myObj[i].name);
}
let name1 = myObj[0].name;
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