How to count duplicate value in an array in javascaript

JAHID — Tue, 01 Mar 2022 07:03:55 +0000

const votes = ['Yes', 'Yes', 'Yes', 'No', 'No', 'Absent'];

const result = votes.reduce((prevValue, vote) => {
if (prevValue[vote]) {
prevValue[vote]++;
} else {
prevValue[vote] = 1;
}
return prevValue;
}, {});

console.log(result);

Output: { Yes: 3, No: 2, Absent: 1 }

Js repeat a function by for loop

JAHID — Tue, 15 Feb 2022 07:36:11 +0000

Syntex:

const hi = function () {
console.log('Hi! You Are Welcome !!');
};
function repeat(func, num) {
for (let i = 0; i < num; i++) {
func();
}
}
repeat(hi, 2);

DEV Community: JAHID

How to count duplicate value in an array in javascaript

Js repeat a function by for loop