RosettaCodeData/Task/Letter-frequency/JavaScript/letter-frequency-4.js

20 lines
433 B
JavaScript

(() => {
'use strict';
const letterfreq = text => [...text]
.reduce(
(a, c) => (a[c] = (a[c] || 0) + 1, a),
{}
);
return JSON.stringify(
letterfreq(
`remember, remember, the fifth of november
gunpowder treason and plot
I see no reason why gunpowder treason
should ever be forgot`
),
null, 2
);
})();