Method Array.diff

Get the difference of n arrays

• Syntax Array Array.diff([ Array a0 ... an ])
  
  The difference is computed as the elements which are in the calling array but not in the arrays passed as arguments. Duplicates are removed from the result.
• Parameters

  Array a0 ... an (Optional)

  The arrays to compute the difference from.

• Return value A new array with those elements which are not in arrays a0 trough an.
• Examples

  To get the difference bewteen (0,1,2) and the arrays (0,4,5) and (0,5,6,2);

  // Define array 1
  var a1 = [0,1,2];
  // Define array 2
  var a2 = [0,4,5];
  // Define array 3
  var a3 = [0,5,6,2];
  // Output is (1)
  a1.diff(a2,a3);

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  Source

  Unless otherwise noted all code in the JSLab Standard Library is licensed as GPLv3. See http://www.gnu.org/licenses/gpl.html for the entire license.

  This function has dependencies and will not work stand-alone. Use the download button above instead of copy/paste.

  // ************************************************************************** // Copyright 2007 - 2009 Tavs Dokkedahl // Contact: http://www.jslab.dk/contact.php // // This file is part of the JSLab Standard Library (JSL) Program. // // JSL is free software; you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation; either version 3 of the License, or // any later version. // // JSL is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program. If not, see <http://www.gnu.org/licenses/>. // *************************************************************************** // Return elements which are in A but not in arg0 through argn Array.prototype.diff = function() { var a1 = this; var a = a2 = null; var n = 0; while(n < arguments.length) { a = []; a2 = arguments[n]; var l = a1.length; var l2 = a2.length; var diff = true; for(var i=0; i<l; i++) { for(var j=0; j<l2; j++) { if (a1[i] === a2[j]) { diff = false; break; } } diff ? a.push(a1[i]) : diff = true; } a1 = a; n++; } return a.unique(); };