furf/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
// If you've done this:
//
// if (typeof data.deeply !== 'undefined' &&
//     typeof data.deeply.nested !== 'undefined' &&
//     typeof data.deeply.nested.value !== 'undefined') { /* ... */ }
//
// You need this:

function (
  object,                         // JavaScript object w/ iterable properties
  path,                           // dot|bracket-delimited path to property
                                  // e.g. 'deeply.nested.array[1].value'
  index                           // iteration index
) {

  path = path
    .replace(
      /\[(["']?)([^\1]+?)\1?\]/g, // convert bracket notation
      '.$2')                      // to dot notation
    .replace(/^\./, '')           // remove leading dot if the first property
                                  // uses bracket notation
    .split('.');                  // split dot-delimited notation to array

  for (                           // iterate list of nested properties
    index = 0;                    // from first property
    path[index] &&                // to last specified property
    (object = object[             // setting current object to value of
      path[index++]               // current property (and bumping index)
    ]) != []._;                   // while value is defined
  );

  return object;                  // return defined value or undefined
}

## index.js
function(b,c,a){c=c.replace(/\[(["']?)([^\1]+?)\1?\]/g,".$2").replace(/^\./,"").split(".");for(a=0;c[a]&&(b=b[c[a++]])!=[]._;);return b}

## LICENSE.txt
            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
                    Version 2, December 2004

 Copyright (C) 2011 Dave Furfero <http://furf.com>

 Everyone is permitted to copy and distribute verbatim or modified
 copies of this license document, and changing it is allowed as long
 as the name is changed.

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. You just DO WHAT THE FUCK YOU WANT TO.

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

  "description": "Safely traverse an object for nested (and possibly undefined) property values",

  "keywords": [
    "object",
    "nested",
    "property",
    "traversal",
    "undefined"
  ]
}

## test.html
<!DOCTYPE html>
<meta charset="utf-8">
<title>getDeepValue</title>
<dl>
  <dt>dots</dt>
  <dd>
    <div>Expected value: <b>foo</b></div>
    <div>Actual value: <b id="dots"></b></div>
  </dd>
  <dt>brackets (numeric)</dt>
  <dd>
    <div>Expected value: <b>bar</b></div>
    <div>Actual value: <b id="brackets"></b></div>
  </dd>
  <dt>brackets (quoted)</dt>
  <dd>
    <div>Expected value: <b>☺</b></div>
    <div>Actual value: <b id="quoted"></b></div>
  </dd>
  <dt>undefined</dt>
  <dd>
    <div>Expected value: <b>undefined</b></div>
    <div>Actual value: <b id="undefined"></b></div>
  </dd>
  <dt>non-iterable object</dt>
  <dd>
    <div>Expected value: <b>error</b></div>
    <div>Actual value: <b id="null"></b></div>
  </dd>
</dl>
<script>

  var getDeepValue = function(b,c,a){c=c.replace(/\[(["']?)([^\1]+?)\1?\]/g,".$2").replace(/^\./,"").split(".");for(a=0;c[a]&&(b=b[c[a++]])!=[]._;);return b};

  var data = {
    deeply: {
      nested: {
        value: 'foo'
      }
    },
    '♥ ♫ ★': '☺',
    array: ['foo',['bar','baz']]
  };

  // Test dots
  document.getElementById('dots').innerHTML = getDeepValue(data, 'deeply.nested.value');

  // Test numeric brackets
  document.getElementById('brackets').innerHTML = getDeepValue(data, 'array[1][0]');

  // Test quoted brackets
  document.getElementById('quoted').innerHTML = getDeepValue(data, '♥ ♫ ★');

  // Test undefined
  document.getElementById('undefined').innerHTML = getDeepValue(data, 'deeply.held.belief');

  // Test null
  try {
    document.getElementById('null').innerHTML = getDeepValue(null, 'deeply.nested.value');
  } catch (e) {
    document.getElementById('null').innerHTML = 'error';
  }

</script>
	// If you've done this:
	//
	// if (typeof data.deeply !== 'undefined' &&
	// typeof data.deeply.nested !== 'undefined' &&
	// typeof data.deeply.nested.value !== 'undefined') { /* ... */ }
	//
	// You need this:

	function (
	object, // JavaScript object w/ iterable properties
	path, // dot\|bracket-delimited path to property
	// e.g. 'deeply.nested.array[1].value'
	index // iteration index
	) {

	path = path
	.replace(
	/\[(["']?)([^\1]+?)\1?\]/g, // convert bracket notation
	'.$2') // to dot notation
	.replace(/^\./, '') // remove leading dot if the first property
	// uses bracket notation
	.split('.'); // split dot-delimited notation to array

	for ( // iterate list of nested properties
	index = 0; // from first property
	path[index] && // to last specified property
	(object = object[ // setting current object to value of
	path[index++] // current property (and bumping index)
	]) != []._; // while value is defined
	);

	return object; // return defined value or undefined
	}
	DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
	Version 2, December 2004

	Copyright (C) 2011 Dave Furfero <http://furf.com>

	Everyone is permitted to copy and distribute verbatim or modified
	copies of this license document, and changing it is allowed as long
	as the name is changed.

	DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
	TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

	0. You just DO WHAT THE FUCK YOU WANT TO.
	{
	"name": "getDeepValue",

	"description": "Safely traverse an object for nested (and possibly undefined) property values",

	"keywords": [
	"object",
	"nested",
	"property",
	"traversal",
	"undefined"
	]
	}
	<!DOCTYPE html>
	<meta charset="utf-8">
	<title>getDeepValue</title>
	<dl>
	<dt>dots</dt>
	<dd>
	<div>Expected value: <b>foo</b></div>
	<div>Actual value: <b id="dots"></b></div>
	</dd>
	<dt>brackets (numeric)</dt>
	<dd>
	<div>Expected value: <b>bar</b></div>
	<div>Actual value: <b id="brackets"></b></div>
	</dd>
	<dt>brackets (quoted)</dt>
	<dd>
	<div>Expected value: <b>☺</b></div>
	<div>Actual value: <b id="quoted"></b></div>
	</dd>
	<dt>undefined</dt>
	<dd>
	<div>Expected value: <b>undefined</b></div>
	<div>Actual value: <b id="undefined"></b></div>
	</dd>
	<dt>non-iterable object</dt>
	<dd>
	<div>Expected value: <b>error</b></div>
	<div>Actual value: <b id="null"></b></div>
	</dd>
	</dl>
	<script>

	var getDeepValue = function(b,c,a){c=c.replace(/\[(["']?)([^\1]+?)\1?\]/g,".$2").replace(/^\./,"").split(".");for(a=0;c[a]&&(b=b[c[a++]])!=[]._;);return b};

	var data = {
	deeply: {
	nested: {
	value: 'foo'
	}
	},
	'♥ ♫ ★': '☺',
	array: ['foo',['bar','baz']]
	};

	// Test dots
	document.getElementById('dots').innerHTML = getDeepValue(data, 'deeply.nested.value');

	// Test numeric brackets
	document.getElementById('brackets').innerHTML = getDeepValue(data, 'array[1][0]');

	// Test quoted brackets
	document.getElementById('quoted').innerHTML = getDeepValue(data, '♥ ♫ ★');

	// Test undefined
	document.getElementById('undefined').innerHTML = getDeepValue(data, 'deeply.held.belief');

	// Test null
	try {
	document.getElementById('null').innerHTML = getDeepValue(null, 'deeply.nested.value');
	} catch (e) {
	document.getElementById('null').innerHTML = 'error';
	}

	</script>