decodeQueryString.js

/**
 * Parses a GET-style query string into a key/value object
 * example:
 * decodeQueryString("?sdf=ABC&xyz=jj%C3%BC");
 * Object {sdf: "ABC", xyz: "jjü"}
 *
 * @param {String} s The query string
 */

function decodeQueryString(s) {
	var decoded = {};
	var parts = s.replace(/^[?/]*/,'').split('&');
	parts.forEach(function(part){
		var pair = part.split('=');
		var key = pair[0];
		var value = pair[1];
		decoded[key] = decodeURIComponent(value);
	});
	return(decoded);
}

safeStringify.js

function safeStringify(o) {
	// JSON stringify that does not break on circular references
	// http://stackoverflow.com/a/11616993/370786
	var cache = [];
	var ret = JSON.stringify(o, function(key, value) {
	    if (typeof value === 'object' && value !== null) {
	        if (cache.indexOf(value) !== -1) {
	            // Circular reference found, discard key
	            return;
	        }
	        // Store value in our collection
	        cache.push(value);
	    }
	    return value;
	}, "\t");
	return ret;
	// cache = null; // Enable garbage collection
}