CoffeeScript is a little language that compiles into JavaScript. Underneath all of those embarrassing braces and semicolons, JavaScript has always had a gorgeous object model at its heart. CoffeeScript is an attempt to expose the good parts of JavaScript in a simple way.

learn more… | top users | synonyms

0
votes
0answers
19 views

Idle game code optimization

I am currently making an idle game, and I currently have a few issues about optimization that I want to fix (which I will list at the end). But first, the code: main.coffee ...
3
votes
0answers
16 views

Backbone.model based state machine

I have created a class to keep track of some internal states. You can see it as a very simple implementation of a state machine ...
1
vote
0answers
29 views

Recursively merge objects with corresponding property names

I have such objects that I need to merge: ...
3
votes
1answer
134 views

Configuring a DataTable using CoffeeScript

I am working on a simple Rails app. For the Expense resource I use a DataTable. So, in my CoffeeScript for this resource I basically do several things: initialize ...
1
vote
0answers
20 views

Better way to template in simple coffee script

I am looking to see if there is a better way to refactor the creatMessage such that the logic of identifying message elements is outside the actual message ...
0
votes
0answers
54 views

Initialize Express app with CoffeeScript

I do not care to create an extra layer if that leave the code more beautiful. But I do not want to be doing estupides. I'm using Node.js + Express + CoffeeScript, and I would like to know if what I'm ...
0
votes
0answers
232 views

File upload with Express

A sample file upload application on Express. It use busboy as form data parser ...
0
votes
0answers
445 views

File upload form with React(only frontend)

I wrote a simple file upload with drag-and-drop. It uploads an image to server and show preview on the form. ...
1
vote
1answer
51 views

Kruskal's algorithm

I'm working through Coffeescript implementing simple algorithms (started with Prim's as reviewed in this previous post) and wrote out Kruskal's algorithm as below, with a few helper functions. I'd ...
0
votes
1answer
150 views

Operating on a list of files using recursion

I'm starting just now with CoffeeScript and I found out that I can't solve problems like looping and recursives with just one line. I would like to improve the code that I just wrote using built-in ...
2
votes
3answers
72 views

Prim's algorithm in CoffeeScript

I'm just starting to learn CoffeeScript and am trying to work through simple examples, this one being Prim's algorithm. I'd like feedback on everything but especially on making this script take ...
0
votes
0answers
16 views

AccountModel data structure

I need to model simple account data structure. The user should be able: to add a transaction get information about transaction take all transaction of some type sum a transaction and all its ...
3
votes
0answers
37 views

Using Angular directives for connect HTML clicks in buttons and controller actions

I'm trying to improve my Angular directive. I'm pretty new to CoffeeScript, so I think there may be inconsistent code. ...
1
vote
0answers
145 views

Optimizing redis cache

I am new to Express so I'd like to clear my code. This is Express with Redis support. I am getting someId and then I am searching it on Redis or using scraper which ...
3
votes
0answers
37 views

Search Class with Static Methods

Most of my programming experience is in PHP, and I have always been a bit wary of JavaScript. I have a JavaScript class to manage executing, caching and displaying search results. ...
3
votes
0answers
38 views

Multiple select widget in CoffeeScript

I created a widget to handle multiple selections in CoffeeScript. There's a working attached snippet that uses the compiled JavaScript (Stack Snippets don't support CoffeeScript), which is available ...
4
votes
1answer
55 views

Merge values of the objects properties with the same name into array

I have such input: [ { name: 'timezone', value: 'EST' }, { name: 'interval', value: 'day' }, { name: 'metrics[]', value: 1}, { name: 'metrics[]', value: 2} ] ...
3
votes
0answers
534 views

Passing functions using higher order components in React

After reading this, I'm on board, however it doesn't get into passing methods from the parent class. In my mixins right now I have a lot of helper functions that are used across the various components ...
1
vote
1answer
32 views

Extracting a list of hyperlinks [closed]

I need to produce a list objCollector with some results: ...
2
votes
0answers
51 views

Correcting a quiz

I wrote this code that's supposed to correct quizzes on a webpage, but it feels bloated and I'm sure there's tons of ways to improve it. Any thoughts? ...
4
votes
2answers
342 views

HTML5 Video player

I do HTML5 Video player with some controls. I have a button, where I change classname for make play, pause or replay button. I have a mute/unmute button, volume range slider, timer and fullscreen mode ...
1
vote
0answers
19 views

Extend a rethinkdb query, with `if`s

I have something roughly like this: ...
2
votes
0answers
420 views

Click interceptor directive

I needed a simple way to add this test to certain click events: if isUser then fireClickEvent else openSignInModal So I made this directive: ...
2
votes
0answers
279 views

Resource that use two different services and query with pagination when resolved

I'm learning Angular and I don't like my current approach. The current controller uses first Geolocation service and when ...
2
votes
1answer
102 views

Wait for all resources to be loaded

In my application I need some resources to be loaded and I have services to load each of them and then I need some point to know that all requests finished. First thought was to use $q.all with array ...
3
votes
1answer
973 views

Regex for curly quotes and apostrophes

After years of fear and procrastination I decided to learn regular expressions. This is the result: CoffeScript: ...
5
votes
2answers
217 views

Periodic Table generator

I've been playing around with Jekyll and CoffeeScript the last few days and made a Periodic Table to learn those two. Now, to create the Periodic Table, I take an array of ...
1
vote
1answer
530 views

AngularJS Login Check

I have states that have a requiredlogin object set as true, then I have Angular listen on ...
4
votes
1answer
126 views

Flood game implementation

There is the implementation of flood game on my GitHub. The app.coffee is the main part of project: ...
1
vote
1answer
74 views

CSV lookup problem solved with CoffeeScript

Source code with some test: ...
4
votes
2answers
435 views

Get <TH> texts into a tab separated string

table_with_headers = $(this.dom.table).find("thead tr th").map(-> $(this).text() ).get().join("\t") Can one write it nicer? I especially don't like the inner ...
6
votes
1answer
151 views

English-Russian irregular words tester

Could you please offer some suggestions about my self learning project? It is really hard-coded, but I have no idea what to do next. I'm using angular (only few ...
2
votes
0answers
224 views

RESTful API parsing DBF data HSET in Redis

I have this working code, but would like your review: sync.coffe ...
1
vote
1answer
71 views

Conditional AND statement- which is more readable?

Does this function automationStatusIsSuccessful = (data) -> data.Automation.Status isnt "FAILED" and data.Automation.Status isnt "COMPLETEDWITHERROR"` ...
0
votes
1answer
62 views

Function with underscore overuse

The code below is converting: data from one format to another ...
1
vote
1answer
494 views

Refactor Coffee Script to fire on page load instead of change

I have a Rails app where I'm trying to select a list of facilities based on what region is selected in a form. So far, I've implemented group_collection_select to do this as well as a bit of ...
2
votes
1answer
230 views

NodeJS conditional request before the real request

In my code I have to login a user with username and password. But if the user sends his e-mail instead of his username, I have to resolve it with another request. This is what the code looks like: <...
1
vote
1answer
269 views

Generating Passwords with a Secure PRNG

What's the best way to approach generating a password using a secure prng? In Python, I could simply use os.urandom. Any suggestions on this? ...
5
votes
2answers
61 views

Mathematical boundaries (audio meter)

I've just been putting together an audio meter by stacking bootstrap progress bars, and thought there was probably a better way, mathematically / logically, of achieving this. ...
5
votes
1answer
57 views

Tick module for the game

I tried to look up and suck in most of the information about optimizing this operation and this is what I came up with. As it's pretty much core of the game, I really would like to have it performant ...
1
vote
1answer
83 views

Navigating around ul li and looking for the active state on the current slide

How can I rewrite this in a simpler way? ...
3
votes
1answer
93 views

Automatically gravitate popover towards page center

I've authored a couple of plugins which show popovers on a given element. One of the objectives for both was no specification of plugin direction. So instead of the implementing dev having to specify <...
3
votes
0answers
154 views

Create component with select+button

I'm new to ReactJs and trying to figure out the preferred style. I also have tried it enough to realize that I'm not a fan of jsx and prefer how React looks when written in coffeescript. This is a ...
3
votes
1answer
51 views

Set up event on class and initialize state [closed]

Very similar to this question, I'm curious about common patterns/best practices for handling events in coffeescript classes, particularly when you also need to call the event handlers immediately to ...
4
votes
1answer
207 views

Ruby on Rails text editor

I'm currently building a text editor using contenteditable and RoR back end. As the editor is WYSIWYG and trying to follow DRY, I used only one file to 3 actions: Show, Edit and New. Edit and new ...
4
votes
1answer
218 views

Resize renderer on browser window size change

For a game, there is some WebGLRenderer object that wraps around canvas element. There is need to update it's size when browser window size changes. Here goes my current code written using BaconJS. ...
4
votes
2answers
77 views

Initializing events on class

I wrote a simple class that substitutes all file inputs in an HTML for a more complex template and set some actions on it. The code is rather small, but I'm not used to write JavaScript. I wonder if ...
1
vote
1answer
39 views

Implementing a Simple “MoneyAccount” in CoffeeScript

Please critique this CoffeeScript code. Is it idiomatic? ...
2
votes
1answer
45 views

Cleaner Way to Test for Types? [closed]

I defined a function that multiplies its argument by 3: coffee> foo = (x) -> x * 3 [Function] We can call it with an input of 1: ...
10
votes
1answer
190 views

Optimize CoffeeScript comparison function

I've wrote this CoffeScript function to compare values in a table, but it turned out to be a HUGE function. Since the code is really really long, you can find it here as well. Code explanation: The ...