map.js

const data = [
	{
		id: 1,
		user: 'Kcko',
		gender: 'M'
	},
	{
		id: 2,
		user: 'Superman',
		gender: 'M'
	},
	{
		id: 3,
		user: 'WonderWoman',
		gender: 'F'
	}
];



const hashData = new Map(data.map(user => [user.user, user]))

hashData.set('Kunda', {
	id: 100, 
	user: 'pan Kunda',
	gender: 'NB'
})

console.log(hashData)
console.log(hashData.get('Kcko'))