femto113/LICENSE.txt

## README.md

      
    Raw
  

              README.md
            
          
    140byt.es

A tweet-sized, fork-to-play, community-curated collection of JavaScript.
How to play


Click the  button above to fork this gist.
Modify all the files to according to the rules below.
Save your entry and tweet it up!

Keep in mind that thanks to the awesome sensibilities of the GitHub team, gists are just repos. So feel free to clone yours and work locally for a more comfortable environment, and to allow commit messages.
Rules

All entries must exist in an index.js file, whose contents are

an assignable, valid Javascript expression that
contains no more than 140 bytes, and
does not leak to the global scope.

All entries must also be licensed under the WTFPL or equally permissive license.
For more information

See the 140byt.es site for a showcase of entries (built itself using 140-byte entries!), and follow @140bytes on Twitter.
To learn about byte-saving hacks for your own code, or to contribute what you've learned, head to the wiki.
140byt.es is brought to you by Jed Schmidt, with help from Alex Kloss. It was inspired by work from Thomas Fuchs and Dustin Diaz.

  
## annotated.js
function(
  a // input, must be a two-dimensional, rectangular array (aka matrix)
)
{
  return Object.keys(a[0]).      // yields vector of column indices for first row
    map(function(c) {            // gather for each column in Object.keys
      return a.map(function(r) { //   gather for each row in a
        return r[c]              //     the value for that column in that row
      })
    })
}

## index.js
function(a){return Object.keys(a[0]).map(function(c){return a.map(function(r){return r[c]})})}

## LICENSE.txt
Copyright waived, this code is in the public domain.

## package.json
{
  "name": "matrixTranspose",

  "description": "Transpose a 2-dimensional array/matrix.",

  "keywords": [
    "array",
    "matrix",
    "2d",
    "transpose"
  ]
}

## test.html
<!DOCTYPE html>
<title>Foo</title>
<div>Expected value: <b>[[1, 4, 7], [2, 5, 8], [3, 6, 9]]</b></div>
<div>Actual value: <b id="ret"></b></div>
<script>
  // write a small example that shows off the API for your example
  // and tests it in one fell swoop.

  var myFunction = function(a){return Object.keys(a[0]).map(function(c){return a.map(function(r){return r[c];});});}

  var original = [[1, 2, 3], [4, 5, 6], [7, 8, 9]];
  var transposed = myFunction(original);

  document.getElementById( "ret" ).innerHTML = transposed.toString();
</script>
	function(
	a // input, must be a two-dimensional, rectangular array (aka matrix)
	)
	{
	return Object.keys(a[0]). // yields vector of column indices for first row
	map(function(c) { // gather for each column in Object.keys
	return a.map(function(r) { // gather for each row in a
	return r[c] // the value for that column in that row
	})
	})
	}
	{
	"name": "matrixTranspose",

	"description": "Transpose a 2-dimensional array/matrix.",

	"keywords": [
	"array",
	"matrix",
	"2d",
	"transpose"
	]
	}
	<!DOCTYPE html>
	<title>Foo</title>
	<div>Expected value: <b>[[1, 4, 7], [2, 5, 8], [3, 6, 9]]</b></div>
	<div>Actual value: <b id="ret"></b></div>
	<script>
	// write a small example that shows off the API for your example
	// and tests it in one fell swoop.

	var myFunction = function(a){return Object.keys(a[0]).map(function(c){return a.map(function(r){return r[c];});});}

	var original = [[1, 2, 3], [4, 5, 6], [7, 8, 9]];
	var transposed = myFunction(original);

	document.getElementById( "ret" ).innerHTML = transposed.toString();
	</script>