mirror of https://github.com/tc39/test262.git
27 lines
954 B
JavaScript
27 lines
954 B
JavaScript
// Copyright 2009 the Sputnik authors. All rights reserved.
|
|
// This code is governed by the BSD license found in the LICENSE file.
|
|
|
|
/*---
|
|
info: Closures are admitted
|
|
es5id: 13.2.1_A5_T2
|
|
description: >
|
|
Returning a function that approximates the derivative of f using
|
|
an interval of dx, which should be appropriately small
|
|
---*/
|
|
|
|
// Return a function that approximates the derivative of f
|
|
// using an interval of dx, which should be appropriately small.
|
|
function derivative(f, dx) {
|
|
return function(x) {
|
|
return (f(x + dx) - f(x)) / dx;
|
|
};
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
//CHECK#1
|
|
if (Math.abs(derivative(Math.sin, 0.0001)(0) - derivative(Math.sin, 0.0001)(2*Math.PI)) >= 1/65536.0) {
|
|
$ERROR('#1: Math.abs(derivative(Math.sin, 0.0001)(0) - derivative(Math.sin, 0.0001)(2*Math.PI)) <= 1/65536.0');
|
|
}
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////
|