Basic function that searches / filters any object or function and returns matched properties.

Grep.js

/*
	Grep.js
	Author	: Nic da Costa ( @nic_daCosta ), Gary Court
    Created : 2012/11/14
	Version	: 0.1.1
	License : MIT, GPL licenses.

	Overview:
	Basic function that searches / filters any object or function and returns matched properties. 
	Main area of use would be for DevTools purposes, when needing to find a specific property but only part of 
        the property name is known. 
        Is now an inherited method on any Object / Function due to Object.prototype. 
        Thus can go ObjectName.Grep( 'SearchTerm' ).
        eg: navigator.Grep( 'geo' );
            var foo = function(){}; foo.Grep( 'proto' );

       *Tested in Chrome Dev Tools*

*/


Object.prototype.Grep = function( strSearch , isRecursive ) {

	// Checks if seach string is not empty/undefined
	if ( !strSearch ) {

		return this;

	};

	// Ignore case
	strSearch = strSearch.toLowerCase();

	// Used to prevent maxing out callstack for sub-lookups due to __proto__ == Object
	isRecursive = isRecursive || false;

	// Declare necessary local variables to hold necessary values
	var objToIterate = this,
		typeOfObject = typeof objToIterate,
		objResult = {},
		count = 0; 
	
	// if item that needs to be iterated over is an object or function, get all properties ( including non enumerable properties )
	if ( typeOfObject === 'object' || typeOfObject === 'function' ) {
	
		var objKeys = Object.getOwnPropertyNames( objToIterate );

		// Loop through all the properties
		for ( var x = 0, xl = objKeys.length; x < xl; ++x ) {

			var item = objKeys[ x ];
		
			// Check if key matches search string, if so add, if not, check if object and iterate through object's keys
			if ( item.toLowerCase().indexOf( strSearch ) >= 0 ) { 

				objResult[ item ] = objToIterate[ item ];
				++count;

			}
			else if ( typeof objToIterate[ item ] === 'object' && !isRecursive ){

				objResult[ item ] = Grep.call( objToIterate[ item ] , strSearch , true );
				++count;

			}

		} );

	};

	// checks if objResult is empty, if so, return empty string.
	return count ? objResult : '';

}