emsdk/upstream/emscripten/node_modules/concat-map/README.markdown

concat-map
==========

Concatenative mapdashery.

[![browser support](http://ci.testling.com/substack/node-concat-map.png)](http://ci.testling.com/substack/node-concat-map)

[![build status](https://secure.travis-ci.org/substack/node-concat-map.png)](http://travis-ci.org/substack/node-concat-map)

example
=======

``` js
var concatMap = require('concat-map');
var xs = [ 1, 2, 3, 4, 5, 6 ];
var ys = concatMap(xs, function (x) {
    return x % 2 ? [ x - 0.1, x, x + 0.1 ] : [];
});
console.dir(ys);
```

***

```
[ 0.9, 1, 1.1, 2.9, 3, 3.1, 4.9, 5, 5.1 ]
```

methods
=======

``` js
var concatMap = require('concat-map')
```

concatMap(xs, fn)
-----------------

Return an array of concatenated elements by calling `fn(x, i)` for each element
`x` and each index `i` in the array `xs`.

When `fn(x, i)` returns an array, its result will be concatenated with the
result array. If `fn(x, i)` returns anything else, that value will be pushed
onto the end of the result array.

install
=======

With [npm](http://npmjs.org) do:

```
npm install concat-map
```

license
=======

MIT

notes
=====

This module was written while sitting high above the ground in a tree.