beyond-code-github’s gists

beyond-code-github / arraysubscriptions.js

Last active August 29, 2015 13:55

Suscribing to array changes using the new arraychange subscriptions in knockout 3.0

beyond-code-github / changetrackedarray.js

Last active August 29, 2015 13:55

Skeleton change tracked array extender for knockout.kj

	ko.extenders.trackArrayChange = function (target, track) {
	if (track) {
	target.isDirty = ko.observable(false);
	target.added = ko.observableArray([]);
	target.removed = ko.observableArray([]);

	var addItem = function (item) {
	//...
	};

beyond-code-github / efficientiteratortests.cs

Created January 21, 2014 22:09

Efficient iterator specifications

	public class ItemA
	{
	public string Identifier { get; set; }
	}

	public class ItemB
	{
	public string Name { get; set; }
	}

beyond-code-github / efficientiterator.cs

Last active January 4, 2016 01:38

Efficient Iterator sample

	public class EfficientIterator<TOne, TTwo>
	{
	private Action<TOne, TTwo> always = (one, two) => { };
	private Action<TOne, TTwo> match = (one, two) => { };
	private Action<TOne> oneOnly = (one) => { };
	private Action<TTwo> twoOnly = (two) => { };

	private readonly Func<TOne, TTwo, int> compare;

	public Action<TOne, TTwo> Always { set { this.always = value; } }

beyond-code-github / compounditeration.cs

Created January 21, 2014 21:23

Example of compound iteration when performing validation against loosely typed data

	public List<string> Validate(IDictionary<string, object> data, List<Field> mandatoryFields)
	{
	var errors = new List<string>();

	foreach (var field in mandatoryFields)
	{
	if (!data.Keys.Contains(field.Identifier))
	{
	errors.add(String.Format("The {0} field is required", field.Identifier);
	}

beyond-code-github / complexexamplemultilevel.js

Last active January 3, 2016 00:58

Example use case demonstrating complex object change tracking at multiple levels

	var viewModel = {
	Name: ko.observable("Pete"),
	Age: ko.observable(29),
	Skills: ko.observable({
	Tdd: ko.observable(true),
	Knockout: ko.observable(true),
	ChangeTracking: ko.observable(false),
	Languages: ko.observable({
	Csharp: ko.observable(false),
	Javascript: ko.observable(false)

beyond-code-github / highlight.js

Created January 12, 2014 15:07

Highlighted portion of example illustrating how we deal with wholesale replacement of a complex object within an observable

	if ((typeof obj == "object") && (obj !== null)) {
	if (target.hasValueChanged()) {
	return ko.mapping.toJS(obj);
	}
	return getChangesFromModel(obj);
	}

beyond-code-github / complexchangetracking.js

Last active January 3, 2016 00:59

Changes required to trackChange and getChangesFromModel methods to support change tracking as well as detection

	ko.extenders.trackChange = function (target, track) {
	if (track) {
	// ...
	// ...

	if (!target.getChanges) {
	target.getChanges = function (newObject) {
	var obj = target();
	if ((typeof obj == "object") && (obj !== null)) {
	if (target.hasValueChanged()) {

beyond-code-github / complexdetectionexample.js

Last active January 3, 2016 00:49

Example of change tracking behavior after applying complex object detection

	var viewModel = {
	Name: ko.observable("Pete"),
	Age: ko.observable(29),
	Skills: {
	Tdd: ko.observable(true),
	Knockout: ko.observable(true),
	ChangeTracking: ko.observable(false),
	},
	Occupation: ko.observable("Developer")
	};

beyond-code-github / complextracker.js

Last active January 3, 2016 00:49

Modified track changes knockout extended that can handle detection of changes to complex objects

	var traverseObservables = function (obj, action) {
	ko.utils.arrayForEach(getObjProperties(obj), function (observable) {
	if (observable && observable.value && !observable.value.nodeType && ko.isObservable(observable.value)) {
	action(observable);
	}
	});
	};

	ko.extenders.trackChange = function (target, track) {
	if (track) {

Pete Smith beyond-code-github