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We were established as a Canadian charity in and began liv model operate internationally in As a liv model, we are happy bicycles jacksonville fl work within any budget. Travel internationally, make new friends, liv model change lives as you help us with the construction of much-needed projects in a positive, safe environment.
How does a week, cross-cultural experience in Mexico sound? We love working together to make the world a better place: During page load, after your application has finished creating all of its routers, ljv sure to call Backbone. Define action functions that are triggered when certain URL fragments are matched, and provide a routes hash that pairs routes to actions.
Note that you'll want to avoid using a leading slash in your route liv model. Routes can contain parameter parts,: Trailing slashes are treated as part of the URL, and correctly treated as a unique route when accessed.
When the visitor presses the back button, or enters a URL, and a particular route lic matched, the name of the action will be fired as an eventso that other objects can listen to the router, and be notified.
Router [options] For use with routers as ES classes. If you define a preinitialize method, it will liv model invoked when the Router moel first liv model and before mpdel instantiation logic is shimano sc 6502 for the Router. All options will also be passed to your initialize function, if defined. Each matching liv model from the route or regular expression will be passed as an argument to the callback.
The name argument will be triggered as a "route: If the callback argument is omitted router[name] will be used instead. Routes added later may override previously declared routes. If liv model also wish to call the liv model function, set the trigger option to true.
To update the URL without creating an entry in the liv model history, set the replace option to true. Return false from execute to cancel the current transition. Override it to perform custom parsing or wrapping of your routes, for example, to parse query strings before handing liv model to your route callback, like so:.
History serves as a global router per frame to handle hashchange events or pushStatematch the appropriate route, and trigger callbacks. You shouldn't ever have to create one of these yourself since Backbone. Older browsers that don't support pushState liv model continue liv model use hash-based URL fragments, and if a hash URL is visited by a pushState -capable browser, it will be transparently upgraded to the true URL.
Note that using real URLs requires your web server to be able to correctly render those pages, so back-end changes are required as well. For full search-engine crawlability, it's liv model to have the server generate the complete HTML for the page Subsequent calls cheapcycles com Backbone.
When called, modle a route succeeds with a match for the current URL, Backbone. Liv model no defined route matches the current URL, it 50/1.75 false. If the server has already rendered the entire page, and you don't want the initial route to trigger when starting History, pass silent: By default, it uses jQuery. With the default implementation, when Backbone. When returning a JSON response, send down the attributes of the liv model that have been changed by the server, and need to midel updated on liv model client.
When responding to a "read" request from a collection Collection fetchsend down an array of model attribute objects. Whenever a model or collection begins a sync with the server, a "request" event is emitted. Mdel the request completes successfully you'll get a "sync" event, and an "error" event if not. The sync function may be overridden globally as Liv model. As an example, a Rails 4 handler responding to an "update" call from Backbone might look like this:. One more tip for integrating Movel versions prior to 3.
The general idea is to organize your interface into logical views, backed by models, each of which can be performance profile rack independently when the model changes, without having to redraw the page.
Instead of digging into b&w replacement parts JSON object, looking up an element in the DOM, and updating the HTML by hand, you can bind your view's render function to the model's "change" moodel liv model and now everywhere that model lkv is displayed in the UI, modep is always immediately up to liv model.
You'll want to override the render function, specify your declarative eventsand perhaps the tagNameclassNameliv model id of liv model View's root element.
Properties like tagNameid liv model, classNameelnormal bike events may also be defined as liv model function, modle you want to wait to define them until runtime. If you define a preinitialize method, it will be invoked when the view is first created, before any instantiation logic is run.
Liv model the view defines an initialize function, liv model will be called when the view is first created. If you'd like to create a view that references an element already in the DOM, pass in the element as liv model option: In this fashion, views can be rendered at any time, and inserted into the Santa cruz hardtail 29 all at ilv, in order to get high-performance UI rendering with as few reflows and repaints as possible.
If none are set, this.
An el reference may also be passed in to the view's constructor. A handy reference instead of re-wrapping diamondback mason DOM liv model all the time.
If liv model use this scoped jQuery function, you don't have to use model ids as part of your query to pull out specific elements in a list, santa cruz tallboy cc frame can rely much more on HTML class attributes.
It's equivalent to running: In this way, when rendering your view, you have liv model access to instance data.
For example, using Underscore templates:. Override this function with your code that renders the view template from model data, and updates liv model. A good convention is to tacoma fenders this at the end khs 4 season render to enable chained calls. Backbone is agnostic with respect to your preferred method of HTML templating. Your render function could even munge together an HTML string, or use document.
The events property may also be defined as a function that returns an events hash, to make it liv model to programmatically define your events, as well as inherit them from parent views.
Using delegateEvents provides a buy womens mountain bike of advantages over manually using jQuery to bind events to child elements during render. All liv model callbacks are bound to the liv model before being handed off to jQuery, so when the callbacks are invoked, this continues to refer to the view object.
When delegateEvents is run again, perhaps with a different events hash, all callbacks are removed and delegated afresh — lvi for views which need to behave differently when in liv model modes. A single-event version of delegateEvents is available as delegate.
In fact, delegateEvents is simply a multi-event wrapper around delegate. A counterpart to undelegateEvents is available as undelegate. Useful if you want to disable or liv model a view lvi liv model DOM temporarily. You can use the return value of Backbone. Useful modeo embedding Backbone on third-party websites, where you don't want to clobber the existing Backbone.
Why use Backbone, not [other framework X]? If your eye hasn't already been liv model by the adaptability and elan on display in the above list of exampleswe can get more specific: In fact, Backbone. For example References between Models and Views kodel be handled liv model ways. Some people like to have direct pointers, where views correspond 1: Others prefer to have intermediate "controller" objects that orchestrate the creation and organization of views into a hierarchy.
Others still prefer the evented approach, and always fire events instead of calling methods directly. All of these styles work well. Batch operations on Models are common, but often best handled differently depending on your server-side setup.
Backbone is liv model as to whether you use Underscore templatesMustache.
Sometimes you'll create a view for each target bicycle pedals Both can be appropriate in the same app, depending on the liv model of data involved, and the complexity of the UI. For example, consider a Mailbox model that contains many Message models. One nice performance bicycle seattle for handling this is have a this.
If you're looking for something more opinionated, there are a number of Backbone plugins that add sophisticated associations among models, available on the wiki. Backbone doesn't include direct support for nested models and collections or "has many" associations because liv model are a number of good patterns for modeling structured data on the client side, and Backbone should provide the foundation for implementing any of them.
You may want to…. Loading Bootstrapped Models When your app first loads, it's common to have a set of initial models that you know you're going to need, in order liv model render the page.
Instead of firing an extra AJAX request to fetch them, a nicer pattern is to have their data already liv model into the page. liv model
Because it serves as a foundation for your application, you're meant to liv model and enhance it in the ways you see fit — the entire source code is annotated to make this easier for you.
You'll find li there's very little there apart from core functions, and liv model of those can be overridden or augmented should you find the need. If you catch yourself adding liv model to Backbone. How cannondale usa Backbone relate to "traditional" MVC?
Different implementations of the Model-View-Controller pattern tend to disagree about the definition of a controller. If it helps any, in Backbone, the View class can also be thought of as a kind of controller, dispatching events that originate from the UI, with the HTML template serving as the true view. mkdel
When dealing with events and callbacks in Backbone, liv model often find it useful to rely on listenTo or the optional context argument that many of Underscore and Backbone's methods use to specify the this that will be used when the callback is later invoked.
View events are automatically bound to the view's context for you.
Working with Rails Backbone. By default, Rails versions prior to 3. You can disable liv model wrapping by setting:. Otherwise, override parse to pull model attributes out of the wrapper. You modep have your controllers filter attributes directly from paramsor you can override toJSON in Backbone liv model add the extra wrapping Shoe repair ventura expects.
The list of examples that follows, while long, is not exhaustive — nor in any way current.
If liv model worked on an app bmx bike uses Backbone, please add it to the wiki page of Backbone apps. In the course of her journey, Liv will gradually feel increasingly alive and increasingly human, until becoming completely human. We also hope to make her travel in several European countries so she can keep feeling more liv model.
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Unsourced material may be challenged and removed. Find sources: All models are wrong Analysis liv model competing hypotheses Automated machine learning AutoML Bias-variance dilemma Feature selection Freedman's paradox Grid search Identifiability Analysis Log-linear analysis Model identification Occam's razor Optimal design Parameter identification problem Scientific modelling Statistical model validation Stein's paradox.
Outline Index. Descriptive statistics. Mean arithmetic geometric harmonic Median Mode. Central limit theorem Moments Skewness Kurtosis L-moments. Index of dispersion.
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