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Make numbers in array relative to 0 – 100 in JavaScript
Let’s say, we have an array that contains some numbers, our job is to write a function that takes in the array and maps all the values relative to 0 to 100. Means that the greatest number should get replaced by 100, the smallest by 100 and all others should get converted to specific numbers between 0 and 100 according to the ratio.
Following is the code for doing the same −
Example
const numbers = [45.71, 49.53, 18.5, 8.38, 38.43, 28.44];
const mapNumbers = (arr) => {
const max = Math.max(...arr);
const min = Math.min(...arr);
const diff = max - min;
return arr.reduce((acc, val) => acc.concat((100/diff)*(val-min)), []);
};
console.log(mapNumbers(numbers));Output
The output in the console will be −
[ 90.71688942891859, 100, 24.59295261239368, 0, 73.02551640340218, 48.74848116646417 ]
Updated on: 21-Aug-2020
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