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Store count of digits in order using JavaScript
Suppose we have a string with digits like this −
const str = '11222233344444445666';
We are required to write a JavaScript function that takes in this string and returns an object that represents the count of each number in the string.
Therefore, for this string, the output should be −
const output = { "1": 2, "2": 4, "3": 3, "4": 7, "5": 1, "6": 3 };
Example
Following is the code −
const str = '11222233344444445666'; const mapString = str => { const map = {}; for(let i = 0; i < str.length; i++){ map[str[i]] = (map[str[i]] || 0) + 1; }; return map; }; console.log(mapString(str));
Output
This will produce the following output in console −
{ '1': 2, '2': 4, '3': 3, '4': 7, '5': 1, '6': 3 }
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