coffeescript

问题 I would like to detect when the user scrolls past a certain point in the window. [Meta] X scroll below = alert() I'm quite new to CoffeeScript, so any help would be great! What I currently have is this: $("#area_1").bind('scroll', -> scrollPosition = $(this).scrollTop() + $(this).outerHeight() divTotalHeight = $(this)[0].scrollHeight() if (scrollPosition >= divTotalHeight) alert('end reached') ) And no alert is showing up. Any tips? Update I suspect that my problem have to do with my two

问题 I have a for loop iterating through a variable number of draggable elements, creating a stop-event callback for each. The callback function needs to know the index of the item that it is linked to. I've encountered what I think is a closure problem: when the callbacks are fired off, the state of the loop iterator index variable that gets passed to the callback (_x) is the last value of the loop iterator index, rather than the value of that iterator index at the time the callback function was

问题 I'm using jQuery UI plugin and the latest jQuery. I would like to sequentially add on the class, one by one down my array of elements. Right now I have this : $(@el).addClass("gridBoxComplete", 400, "easeOutBounce").delay(800) Where @el is the current element in the array. This, however, does not delay this object before the next item in the iteration is run. I based this animation roughly off of this idea.. $(@).hide().each (index) -> $(@) .delay(index * 100) .fadeIn 500 回答1: delay() delays

问题 Following up from my previous question, here, I am trying to get 'spec' files registered by Atom, which I have succeeded in, however now, no matter how many describe and it 's I do, it doesn't do anything when I test it. I use the command, apm test , and all I get is: [655:0527/083825:WARNING:resource_bundle.cc(305)] locale_file_path.empty() for locale English [655:0527/083825:ERROR:file_io.cc(30)] read: expected 40, observed 0 [659:0527/083825:WARNING:resource_bundle.cc(305)] locale_file

问题 I am trying to redirect the page on the successful ajax call, the following code works fine, $.ajax( { type: "POST", url: path, data: response1, contentType: "application/json", success: -> window.location.replace("http://172.16.17.141:81/configuration/manage_users") }); Problem with this approach is that the path I am giving is fixed, I want something like, $.ajax( { type: "POST", url: path, data: response1, contentType: "application/json", success: -> alert(window.location.host + "

问题 The following code defines two functions, lines and circles , that return a function, f and g respectively. Functions f and g are equal ( () -> size ) only for simplicity, but in general they are different functions of the variable size . lines = () -> size = 10 # default value f = () -> size f.size = (_) -> size = _ f f circles = () -> size = 15 # default value g = () -> size g.size = (_) -> size = _ g g On the console, the above code results on the following pattern, which is what I need: >

问题 I want to make a CoffeeScript function that even if it is invoked multiple times, has its effects only run once. Is one of these, or another way a good way to make a once-invokable function ? Is the extra do an issue or actually better ? once_maker_a = (f)-> done=false -> f.call() unless done done=true once_maker_b = (f)-> do(done=false)-> -> f.call() unless done done=true oa = once_maker_a(-> console.log 'yay A') ob = once_maker_b(-> console.log 'yay B') oa() yay A #runs the function passed

问题 Working on an app that has events and each event has many images Here is the association: images: DS.hasMany("event-image", { async: true }) The EventImage Model: `import DS from 'ember-data'` EventImage = DS.Model.extend event: DS.belongsTo("event") ### NATURAL ATTRIBUTES ### imageUrl: DS.attr("string", { defaultValue: "" }) fileName: DS.attr("string") fileSize: DS.attr("string") primary: DS.attr("boolean", { defaultValue: false }) featured: DS.attr("boolean", { defaultValue: false })

问题 I posted question recentry as same how to use local or instance variable inruby codein coffeescript in haml templ Getting helpful comment, I'm trying to pass param to controller in ajax but it always returns error callback I can't not find the reason. Here is my code. .html.haml :coffee $('input#field').change -> $.ajax url: '/posts/gaga' type: "GET" dataType: "json" data: { code: $('input#field').val() } error: (jqXHR, textStatus, errorThrown) -> alert "error" success: (data, textStatus,

问题 The following gives a syntax error related to the anonymous function: my_function = (f, x, str) -> alert str + f(x) my_function (x) -> 1 + x, 12, "The answer is: " The following works: my_function = (f, x, str) -> alert str + f(x) increment = (x) -> x + 1 my_function increment, 12, "The answer is: " 回答1: my_function ((x) -> x + 1), 12, "The answer is: " That should fix it. 来源： https://stackoverflow.com/questions/6720402/in-coffeescript-how-can-you-make-a-function-call-with-anonymous-functions