text: import { csFlip } from './csFlip'
  
  /**
   * Marks the node at w[j]
   *
   * @param {Array}   w               The array
   * @param {Number}  j               The array index
   *
   * Reference: http://faculty.cse.tamu.edu/davis/publications.html
   */
  export function csMark (w, j) {
    // mark w[j]
    w[j] = csFlip(w[j])
  }
  