Method mapElementsToSortedPosition

src/Encoder/ADFGXCipher.js:204–220

* Maps the given elements to their corresponding positions in a sorted array. * @protected * @param {array} elements Array of elements * @return {array} Array with the corresponding position for each element

(elements)

   * @return {array} Array with the corresponding position for each element
   */
  mapElementsToSortedPosition (elements) {
    const length = elements.length
    const map = new Array(length)
    const from = elements.slice()
    const to = elements.slice().sort()
    let index

    for (let k = 0; k < length; k++) {
      index = from.indexOf(to[k])
      map[k] = index
      // Flag the element as claimed, with that duplicate elements are mapped to
      // different sorted positions
      delete from[index]
    }

    return map
  }

  /**
   * Triggered when a setting field has changed.