vueplug-typer/src/utils/shuffle.ts

Vue component that simulates a user typing, selecting, and erasing text.

import randomInt from "./random-int";

function swap(a, i, j) {
  if (i === j) {
    return;
  }
  const temp = a[i];
  a[i] = a[j];
  a[j] = temp;
}

/**
 * Performs an in-place shuffle.
 * Implemented using the Fisher-Yates/Knuth shuffle algorithm.
 * @param list - Array of items to shuffle in-place.
 */
export default (list) => {
  if (!(list instanceof Array)) {
    return;
  }

  for (let i = list.length - 1; i > 0; i--) {
    let randomIndex = randomInt(0, i);
    swap(list, i, randomIndex);
  }
};