I have an array which i want to change that array item as an object as shown below.
let a=['monkey: animal','John:human', 'Rob:human', 'donkey:animal']
I need output as below;
output={
animal: ['monkey', 'donkey'],
human: ['John', 'Rob']
}
Here's one solution using String#split and Array#reduce:
let a = ['monkey: animal','John:human', 'Rob:human', 'donkey:animal'];
const output = a
.map(text => text.split(':').map(t => t.trim()))
.reduce((acc, [name, specie]) => {
if (acc[specie]) {
acc[specie].push(name);
} else {
acc[specie] = [name];
}
return acc;
}, {});
console.log(output);The ordinary approach to data aggregation:
const arr = ['monkey: animal','John:human', 'Rob:human', 'donkey:animal'];
const result = arr.reduce((acc, item) => {
const [value, key] = item.split(':').map(e => e.trim());
acc[key] ??= [];
acc[key].push(value)
return acc;
}, {});
console.log(result);.as-console-wrapper { max-height: 100% !important; top: 0 }