coffeescript

问题 I am trying to develop the login functionality in meteor, and I am using jade-handlebars and coffeescript. My coffeescript page: Template.navigation.events "submit #login-form": (e, t) -> e.preventDefault() if Meteor.userId() Meteor.logout() else # retrieve the input field values email = t.find("#login-email").value password = t.find("#login-password").value # If validation passes, supply the appropriate fields to the # Meteor.loginWithPassword() function. Meteor.loginWithPassword email,

问题 Apologies for my english, I am trying to extend a View with a mixin. The code is coffeescript : View - films_film_view.js.coffee App.FilmsFilmView = Em.View.extend App.ModalViewMixin, templateName: 'films/show' Mixin - modal_view_mixin.js.coffee App.ModalViewMixin = Em.Mixin.create modalView: null click: -> @showModalView() close: -> @closeModalView() closeModalView: -> if @modalView @modalView.close() showModalView: -> @closeModalView() @modalView = @createModalView() if @modalView

问题 I have the following method on a backbone view defined in coffeescript: saveObservation: => self = @ observation = new Observation(ParentUid: _questionUid, Status: "N/a", Text: "Change to element") observation.save { success: -> alert('test') error: -> alert('failed') } Observation is extended from Backbone.Model class Observation extends Backbone.Model url: -> "/AuditActionTracking/" The save reaches the server but neither the success nor the error handlers I have defined in the save are

问题 In CoffeeScript sometimes I need to call Array.reduce(...) with a default value; however, the unfortunate ordering of the arguments means the initial/default value goes after the reduce function itself, which means I've got to use a lot of parens, which seems much uglier than CoffeeScript wants to be. For example: items = [ (id:'id1', name:'Foo'), (id:'id2', name:'Bar') ] # ... itemsById = items.reduce(((memo, item) -> # <-- Too many parens! memo[item.id] = item memo), {}) # Ugly! Is there a

问题 I wanna catch all events except 'reset'. I've a code like this initialized inside a View. messagesCollection.on 'all', @_handleMessageChanges, @ Right now it works for all events. As I've mentioned above I don't need to catch in a reset event. How can I resolve this issue? Please help us. 回答1: When using all , the first argument is the event . So, you can do _handleMessageChanges: function(event, ...) { if ( event === 'reset' ) return; } See it in action here: http://jsfiddle.net/nxs9q/1 From

问题 In his book "Secrets of the Javascript Ninja", John Resig writes: Although dynamic code evaluation has been maligned due to its complexity and potential for security issues, without it we wouldn’t have had the CoffeeScript programming language. I was hoping that someone could explain what is Dynamic Code Evaluation? Also, are there any code examples (or word examples) that would help better explain it? Furthermore, are there any website examples that use dynamic code evaluation? Also, if

问题 This is sort of a complex question so it will take a bit to explain. I'm not looking for a direct answer so any advice would be good. I have a Django app that uses a lot of CoffeeScript. To compile the CoffeeScript in the project I am using the app django-compressor . To use django-compressor I need to install nmp (node package manager). Unfortunately, I can't install npm on Heroku. Thus, I need to compile the CoffeeScript before it hits the Heroku servers. So I did that by setting up Fabric

问题 I have a view helper, let say (for simplicity's sake) def call_alert return "alert 'this should appear'" end Then I have a coffeescript file some_test_page.js.coffee which renders for an action which is called via ajax. Inside this some_test_page.js.coffee I have: <%= call_alert %> When I do an ajax call to /some_test_page , I usually would expect to get a response with the compiled javascript from the coffeescript file and an alert would occur. However, it seems the view helper I tried to

问题 I am working on rails 3.2 and using coffeescript too.. I have a doubt in using jquery mobile inside my application I have a html like <a href="#" data-item=12 data-status=true class="follow"> <span class="ui-btn-inner"> <span class="ui-btn-text"> Follow </span> </span> </a> In my coffeescript, i am trying to write function on click of this Follow, i am trying to send a ajax call. when i wrote like $("a.follow").unbind('click').bind 'click', (event, data) -> event.stopPropagation() clickedEl =

问题 Related, but not a fix: jQuery issue - #<an Object> has no method I'm getting an error Object [object Object] has no method 'effect' when I try to use the effect function in jquery (doc http://docs.jquery.com/UI/Effects/Highlight). It's working fine in JSFiddle but it errors out when I run the site in Chrome or IE. The div gets shown but the effect call throws an error. Live version can be found here: http://jsfiddle.net/jcollum/HK625/ Html <a id=showHowThisWorks >How does this all work?</a>