David East davideast

## extend.js
function extend(base) {
    var parts = Array.prototype.slice.call(arguments, 1);
    parts.forEach(function (p) {
        if (p && typeof (p) === 'object') {
            for (var k in p) {
                if (p.hasOwnProperty(k)) {
                    base[k] = p[k];
                }
            }
        }

## 1_query_timestamp.js
// assumes you add a timestamp field to each record (see Firebase.ServerValue.TIMESTAMP)
// pros: fast and done server-side (less bandwidth, faster response), simple
// cons: a few bytes on each record for the timestamp
var ref = new Firebase(...);
ref.orderByChild('timestamp').startAt(Date.now()).on('child_added', function(snapshot) {
  console.log('new record', snap.key());
});

## firebase_snapshot_parent.js
function getParent(snapshot) {
  // You can get the reference (A Firebase object) from a snapshot
  // using .ref().
  var ref = snapshot.ref();
  // Now simply find the parent and return the name.
  return ref.parent().name();
}

var testRef = new Firebase("https://example.firebaseIO-demo.com/foo/bar");
testRef.once("value", function(snapshot) {

## firebase_detect_data.js
function go() {
  var userId = prompt('Username?', 'Guest');
  checkIfUserExists(userId);
}

var USERS_LOCATION = 'https://SampleChat.firebaseIO-demo.com/users';

function userExistsCallback(userId, exists) {
  if (exists) {
    alert('user ' + userId + ' exists!');

## css-to-select-range-of-children.html
<!DOCTYPE html>
<html>
<head>
  <style>
    /* How to select a range of children
     * (Here, 3rd-7th children, inclusive):
     */
    ul li:nth-child(n+3):nth-child(-n+7) {
      outline: 1px solid #0f0;
    }
	function extend(base) {
	var parts = Array.prototype.slice.call(arguments, 1);
	parts.forEach(function (p) {
	if (p && typeof (p) === 'object') {
	for (var k in p) {
	if (p.hasOwnProperty(k)) {
	base[k] = p[k];
	}
	}
	}
	// assumes you add a timestamp field to each record (see Firebase.ServerValue.TIMESTAMP)
	// pros: fast and done server-side (less bandwidth, faster response), simple
	// cons: a few bytes on each record for the timestamp
	var ref = new Firebase(...);
	ref.orderByChild('timestamp').startAt(Date.now()).on('child_added', function(snapshot) {
	console.log('new record', snap.key());
	});
	function getParent(snapshot) {
	// You can get the reference (A Firebase object) from a snapshot
	// using .ref().
	var ref = snapshot.ref();
	// Now simply find the parent and return the name.
	return ref.parent().name();
	}

	var testRef = new Firebase("https://example.firebaseIO-demo.com/foo/bar");
	testRef.once("value", function(snapshot) {
	function go() {
	var userId = prompt('Username?', 'Guest');
	checkIfUserExists(userId);
	}

	var USERS_LOCATION = 'https://SampleChat.firebaseIO-demo.com/users';

	function userExistsCallback(userId, exists) {
	if (exists) {
	alert('user ' + userId + ' exists!');
	<!DOCTYPE html>
	<html>
	<head>
	<style>
	/* How to select a range of children
	* (Here, 3rd-7th children, inclusive):
	*/
	ul li:nth-child(n+3):nth-child(-n+7) {
	outline: 1px solid #0f0;
	}