nstatistics/utils/arrayEquals.js

Solve equations using numerical methods, linear álgebra and solver of linear equation system

'use strict'
module.exports = function ( ) {
  // attach the .equals method to Array's prototype to call it on any array
  Array.prototype.equals = function ( array ) {
      // if the other array is a falsy value, return
      if ( !array ) {
        return false;
      }
      // compare lengths - can save a lot of time
      if ( this.length !== array.length ) {
        return false;
      }

      for ( var i = 0, l = this.length; i < l; i++ ) {
        // Check if we have nested arrays
        if ( this[ i ] instanceof Array && array[ i ] instanceof Array ) {
          // recurse into the nested arrays
          if ( !this[ i ].equals( array[ i ] ) ) {
            return false;
          }
        } else if ( this[ i ] !== array[ i ] ) {
          // Warning - two different object instances will never be equal: {x:20} != {x:20}
          return false;
        }
      }
      return true;
    }
    // Hide method from for-in loops
  Object.defineProperty( Array.prototype, 'equals', {
    enumerable: false
  } );
}