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// Given an array of n  integers, find and print the minimum absolute difference
// between any two elements in the array (where i!=j, 2<=n<=10^9) 

function findMinDiff(arr) {
  let n = arr.length;
  // Sort array in non-decreasing order
  arr.sort(function(a, b) {
    return a - b;
  });

  // Initialize difference as infinite
  let diff = Infinity;

  // Find the min diff by comparing adjacent
  // pairs in sorted array
  for (let i=0; i<n-1; i++) {
    let localDiff = arr[i+1] - arr[i];
    if (localDiff < diff)
      diff = localDiff;
  }

  // Return min diff
  return diff;
}

let arr = [1, 5, 3, 19, 18, 25];
console.log(findMinDiff(arr)); // 1