ulp/README.md

Math.nextAfter, Math.nextDown, Math.nextUp, Math.ulp in javascript (from https://gist.github.com/Yaffle/4654250)

# ulp

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Math.nextDown, Math.nextUp, Math.ulp in javascript (from https://gist.github.com/Yaffle/4654250)

## `nextUp(x: number): number`

Returns the smallest floating-point number greater than `x`.
**Denormalized values may not be supported.**

```js
var nextUp = require('ulp').nextUp
nextUp(1) // 1.0000000000000002
```

## `nextDown(x: number): number`

Returns the largest floating-point number less than `x`.
**Denormalized values may not be supported.**

```js
var nextDown = require('ulp').nextDown
nextDown(1) // 0.9999999999999999
```

## `ulp(x: number): number`

Returns the unit in the last place of `x`.
**Denormalized values may not be supported.**

```js
var ulp = require('ulp').ulp
ulp(1) // 1.1102230246251565e-16
```

## `monkeypatch(): void`

Monkeypatches `nextUp`, `nextDown`, and `ulp` onto `Math`.

```js
require('ulp').monkeypatch()
Math.nextUp(1) // 1.0000000000000002
Math.nextDown(1) // 0.9999999999999999
Math.ulp(1) // 1.1102230246251565e-16
```