MinimumAbsoluteDifferenceAnAnArray.js

'use strict';

const fs = require('fs');

process.stdin.resume();
process.stdin.setEncoding('utf-8');

let inputString = '';
let currentLine = 0;

process.stdin.on('data', inputStdin => {
    inputString += inputStdin;
});

process.stdin.on('end', function() {
    inputString = inputString.replace(/\s*$/, '')
        .split('\n')
        .map(str => str.replace(/\s*$/, ''));

    main();
});

function readLine() {
    return inputString[currentLine++];
}

// Complete the minimumAbsoluteDifference function below.
function minimumAbsoluteDifference(arr) {
// sort array
arr.sort((a, b) => a - b)

// consider a min
let min = Math.abs(arr[0] - arr[1])

for(let i = 1; i < arr.length - 1; i++) {

    // calculate absolute between absolutes
    // minimum difference is between adjacent elements in a sorted array
    let m = Math.abs(arr[i] - arr[i+1])
    if(m < min) {
       min = m
    }
}

return min

}

function main() {
    const ws = fs.createWriteStream(process.env.OUTPUT_PATH);

    const n = parseInt(readLine(), 10);

    const arr = readLine().split(' ').map(arrTemp => parseInt(arrTemp, 10));

    const result = minimumAbsoluteDifference(arr);

    ws.write(result + '\n');

    ws.end();
}