标签: coffeescript

我正在使用typeahead.js将产品ID分配给隐藏的html表单字段.当匹配时,这很有用:

$('.products_tt .typeahead').typeahead
    name: 'products_tt',
    prefetch: 
        url: '/products.json',
        ttl: 60 * 5e3
    template: '<p><strong>{{value}}</strong> – {{year}}</p>',
    engine: Hogan

$('.products_tt .typeahead').on "typeahead:selected typeahead:autocompleted", (e,datum) ->
    $('#disk_file_product_id').val(datum.id)

当输入字段留空时,我清除隐藏字段:

$('.products_tt .typeahead').blur ->
    if $(this).val().length == 0
        $('#disk_file_product_id').val("")

但是我还需要在输入字段中输入文本时清除隐藏字段,但是没有匹配.

我的Java/Coffeescript技能很弱,所以不确定如何做到这一点？!？

我正在尝试添加coffeescripts插件到notepadd ++.我从这里找到了这个插件..dll我从上面的链接下载的zip文件中没有文件.当我读到ReadMeFile时,它说.

# CoffeeScript syntax highlighting for Notepad++
***


Will syntax highlight files with extensions of coffee, coco, and CAKEFILE using Notepad++'s user-defined language(within its limits).


![An example Screenshot](/blakmatrix/CoffeeScript_notepad_UDL/raw/master/example_screenshot.png)


## Deployment


1. If you don't have an userDefineLang.xml file already, you can drop this file among your other configuration file, in the Notepad++ Install Folder. It should be named userDefineLang.xml.
2. Otherwise, open both the existing and new file.
    - Select all of the new file, …

我正在使用coffeescript.我的代码非常简单:

class SomeCollection extends Backbone.Collection
  constructor: (@options) ->
  url: ->
    "#{$SCRIPT_ROOT}/some/data/#{@options.someId}"
  model: SomeModel

class SomeView extends Backbone.View
  initialize: ->
    myCollection = new SomeCollection()
    myCollection.fetch
      success: (coll, resp) ->
        console.log coll

从我的集合的url返回的JSON正是:

[{"id": 1, "comments": "", "name": "images/exceptions/59.png"}]

但是,在将任何内容打印到控制台之前,我在第768行收到了backbone.js错误:无法读取未定义的属性1.未定义的对象this._byId在集合的get函数中.我怎么解决这个问题？

问题是如何使用turbolinks并且每个页面都有特定的元标记？

这是application.js:

//= require jquery
//= require jquery_ujs
//= require jquery.turbolinks
//= require dashboard
//= require turbolinks

这是应用程序布局视图:

<title><%= yield_or_default(:title) -%></title>
<meta name="description" content="<%= yield_or_default(:meta_desc) -%>">
<meta name="keywords" content="<%= yield_or_default(:meta_keywords) -%>">
<meta name="robots" content="<%= yield_or_default(:robots) -%>">
<%= stylesheet_link_tag    "application", media: "all", "data-turbolinks-track" => true %>
<%= javascript_include_tag "application", "data-turbolinks-track" => true %>

这是仪表板CoffeeScript:

jQuery ->
  $("#list_tags").html(list_tags())

list_tags = ->  
  "Title: \"" + $('title').text() + "\"<br />" +
  "Meta Description: \"" + $('meta[name=description]').attr('content') + "\"<br />" +
  "Meta Keywords: \"" + …

嗨,我不会自己处理上传流而不接触磁盘驱动器.所以,我的自然选择是多方模块.

我拿了一般的例子,根据页面https://npmjs.org/package/multiparty的说明,我将form.parse更改为非回调请求.在这种情况下,不会触及磁盘.

我的代码看起来像这样:

multiparty = require("multiparty")
http = require("http")
util = require("util")

# show a file upload form
http.createServer((req, res) ->
  if req.url is "/upload" and req.method is "POST"
    form = new multiparty.Form()

    form.on 'error', (err) ->
      console.log "Error received #{err}"

    form.on 'aborted',  ->
      console.log "Aborted"

    form.on 'part', (part) ->
      console.log "Part"

    form.on 'close', (part) ->
      console.log "close received"
      res.writeHead 200,
        "content-type": "text/plain"
      res.end "received upload:\n\n"

    form.on 'progress', (bytesReceived, bytesExpected) ->
      console.log "Received #{bytesReceived}, #{bytesExpected}"

    form.parse req
  else …

这有效:

$('#products.table tr').click ->
  $(@).toggleClass('row_selected')

这不是:

$('#products.table tr').live 'click', (event) ->
  $(@).toggleClass('row_selected')

浏览器控制台出错:

[Error] TypeError: 'undefined' is not a function (evaluating '$('#products.table tr').live')
    ready (products.js, line 10)
    fire (jquery.js, line 3049)
    fireWith (jquery.js, line 3161)
    ready (jquery.js, line 434)
    completed (jquery.js, line 105)

我错过了什么？

在咖啡脚本中,我试图弄清楚数组中是否包含某些内容.但似乎无法弄清楚正确的语法.有没有办法做到这一点,而不必迭代它们？

谢谢,

  if $(this).val() is in ["needs_cover","comatose"]
    $("#head_count").hide()
  else
    $("#head_count").show()

请原谅我糟糕的javascript知识.

我正在尝试从标记为"已选择"的DOM元素返回一个ID值数组,例如[1,2,4].

<tr data-selected = 'true' data-id = '1'></tr>
<tr data-selected = 'true' data-id = '2'></tr>
<tr data-selected = 'false' data-id = '3'></tr>
<tr data-selected = 'true' data-id = '4'></tr>

我试图为此创建一个coffeescript函数

elems = $("tr[data-selected ='true']").data("id")    
alert( elems )

这似乎只返回最后一个元素的data-id值.

如何创建所有ID值的数组？

使用CoffeeScript,我希望能够遍历类的静态方法和变量.更具体地说,我想获得对所有功能的访问权限Math.

我在寻找类似的功能:

for x in Math
    console.log (x + ": " + Math[x])

这可能吗？

我的Rails 4应用程序运行咖啡脚本来绘制谷歌地图.乍一看,它似乎不起作用.但是,当我点击浏览器刷新按钮时,地图会像冠军一样加载.这已经过测试,并且正在发生:

• 移动Safari(iOS7)
• 桌面Safari(OSX)
• Chrome(OSX)
• Chrome(Windows 7)

来自application.html.erb的标题

<head>
    <!-- Boilerplate -->
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
    <meta name="description" content="">
    <meta name="viewport" content="width=device-width">
    <%= stylesheet_link_tag "normalize.min.css" %>
    <%= stylesheet_link_tag "main.css" %>
    <%= javascript_include_tag "vendor/modernizr-2.6.2-respond-1.1.0.min.js" %>

    <!-- Icon Font -->
    <link href="//netdna.bootstrapcdn.com/font-awesome/3.2.1/css/font-awesome.css" rel="stylesheet">

    <!-- Google Maps API -->
    <%= javascript_include_tag "https://maps.googleapis.com/maps/api/js?key=*********&sensor=true" %>

    <!-- Rails -->
    <%= stylesheet_link_tag    "application", media: "all", "data-turbolinks-track" => true %>
    <%= javascript_include_tag "application", "data-turbolinks-track" => true %>
    <%= csrf_meta_tags %>

    <link href='http://fonts.googleapis.com/css?family=Droid+Sans|Lobster' rel='stylesheet' type='text/css'>
</head>

的application.js

// …