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Finding the second most frequent character in JavaScript
We are required to write a JavaScript function that takes in a string and returns the character which makes second most appearances in the string.
Therefore, let’s write the code for this function −
Example
The code for this will be −
const str = 'Hello world, I have never seen such a beautiful weather in the world';
const secondFrequent = str => {
const map = {};
for(let i = 0; i < str.length; i++){
map[str[i]] = (map[str[i]] || 0) + 1;
};
const freqArr = Object.keys(map).map(el => [el, map[el]]);
freqArr.sort((a, b) => b[1] - a[1]);
return freqArr[1][0];
};
console.log(secondFrequent(str));Output
The output in the console will be −
e
Updated on: 19-Oct-2020
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