1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/tests/test262/ch13/13.2/S13.2.1_A5_T2.js Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,27 @@
1.4 +// Copyright 2009 the Sputnik authors. All rights reserved.
1.5 +// This code is governed by the BSD license found in the LICENSE file.
1.6 +
1.7 +/**
1.8 + * Closures are admitted
1.9 + *
1.10 + * @path ch13/13.2/S13.2.1_A5_T2.js
1.11 + * @description Returning a function that approximates the derivative of f
1.12 + * using an interval of dx, which should be appropriately small
1.13 + */
1.14 +
1.15 +// Return a function that approximates the derivative of f
1.16 +// using an interval of dx, which should be appropriately small.
1.17 +function derivative(f, dx) {
1.18 + return function(x) {
1.19 + return (f(x + dx) - f(x)) / dx;
1.20 + };
1.21 +}
1.22 +
1.23 +//////////////////////////////////////////////////////////////////////////////
1.24 +//CHECK#1
1.25 +if (Math.abs(derivative(Math.sin, 0.0001)(0) - derivative(Math.sin, 0.0001)(2*Math.PI)) >= 1/65536.0) {
1.26 + $ERROR('#1: Math.abs(derivative(Math.sin, 0.0001)(0) - derivative(Math.sin, 0.0001)(2*Math.PI)) <= 1/65536.0');
1.27 +}
1.28 +//
1.29 +//////////////////////////////////////////////////////////////////////////////
1.30 +
