How to Write CoffeeScript Efficiently | Hacker News Reader

How to Write CoffeeScript Efficiently

esa-matti.suuronen.org

48 pointswyclif10 comments

Should have been renamed to "Some Vim tricks for CoffeeScript writing".

Could someone explain how {@foo} = bar compiles into this.foo = bar.foo;?

"@" is an alias for "this.", so "@foo" is the same as "this.foo".

{foo} = bar is using destructuring assignment, it means, take property "foo" of bar and put it in variable foo, so

    {foo} = bar

compiles to

    var foo = bar.foo;

Thanks! It was the destructuring part that I wasn't understanding right away.

No problem! CoffeeScript's destructuring is really nice, IMO:

    [first, rest..., last] = someArray

    professions =
      programmer:
        studyTime: "5 years"
        salary: 10000
      salesman:
        studyTime: "2 years"
        salary: 15000
    
    {programmer: {salary}} = professions
    
    console.log "A programmer's salary is %s", salary

EDIT: Fixed bug, "developer" should be "programmer".

   {developer: {salary}} = professions

I followed the link to the Syntastic plugin and can't get it to work. The version on github doesn't have the SyntasticEnable function for some reason, so I used the package on vim.org. I added the statusline changes and SyntaxEnable php to my vimrc, still does absolutely nothing. I'm not seeing anything different on my statusline when saving files and the :Errors function doesn't show anything either. Ideas?

Manually compiling your CoffeeScripts just seems archaic. Is there no equivalent to Sinatra AssetPack for node.js?

Frankly, this is not an efficient workflow for CoffeeScript.

Try http://epeli.github.com/piler/

sadly, this could also be called "why it is difficult to write CoffeScript efficiently without some vim plugins"

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