ds-algo-study/DS-n-Algos/Arrays/difference-between-arrays/array-diff.js

Just experimenting with publishing a package

var flatten = require( 'arr-flatten' );
var slice = [].slice;

/*
-  Return the arrDiference between the first array and additional arrays.
*/

function arrDif( arr, arrays ) {
  var argsLen = arguments.length;
  var len = arr.length,
    i = -1;
  var res = [],
    arrays;

  if ( argsLen === 1 ) {
    return arr;
  }

  if ( argsLen > 2 ) {
    arrays = flatten( slice.call( arguments, 1 ) );
  }

  while ( ++i < len ) {
    if ( !~arrays.indexOf( arr[ i ] ) ) {
      res.push( arr[ i ] );
    }
  }
  return res;
}

module.exports = arrDif;