How can I turn an array object into an object?-CodePudding

I want to put an array object called hello into a constant called answer. At this time, I want to change the key value of the answer to the value key of hello and the value of the answer to the label value of hello.

how can i do that? i was thinking object entries but i couldn't do that.... is it possible??

this is my code

const hello = [
{ label: 'one', value: 'Tangerinefeed' },
{ label: 'two', value: 'dryexamfeed' },
{ label: 'three', value: 'wetfeed' },
{ label: 'forth', value: 'sawdust' },
{ label: 'five', value: 'etc' },
] ;

expected answer

const answer = {Tangerinefeed: 'one', dryexamfeed: 'two', wetfeed: 'three', sawdust: 'forth', etc: 'five'}

CodePudding user response：

You can use reduce to achieve it

const hello = [
{ label: 'one', value: 'Tangerinefeed' },
{ label: 'two', value: 'dryexamfeed' },
{ label: 'three', value: 'wetfeed' },
{ label: 'forth', value: 'sawdust' },
{ label: 'five', value: 'etc' },
] ;

const finalResult = hello.reduce((result, item) => {
  result[item.value] = item.label
  return result
}, {})

console.log(finalResult)

CodePudding user response：

You can do it with forEach method.

const hello = [
{ label: 'one', value: 'Tangerinefeed' },
{ label: 'two', value: 'dryexamfeed' },
{ label: 'three', value: 'wetfeed' },
{ label: 'forth', value: 'sawdust' },
{ label: 'five', value: 'etc' },
] ;

const answer = {};

hello.forEach(a=>{ answer[a.value]=a.label})

console.log(answer);

CodePudding user response：

i would use reduce.. ex:

const answer = hello.reduce((prev, cur) => {
  prev[cur.value] = cur.label;
  return prev;
}, {});

CodePudding user response：

Have you ever used a map? Hope it helps you. Thank you.

const hello = [
    { label: 'one', value: 'Tangerinefeed' },
    { label: 'two', value: 'dryexamfeed' },
    { label: 'three', value: 'wetfeed' },
    { label: 'forth', value: 'sawdust' },
    { label: 'five', value: 'etc' },
]

let answer = {};
hello.map(h => {
    answer[h.value] = h.label;
    return true;
});
console.log(answer);