Comments on: JSLint

By: Ben Shoemate

Ben Shoemate — Sun, 20 Nov 2011 23:17:47 +0000

Good stuff. Reading the post and the comments was very enlightening.

By: Gary A. Stafford

Gary A. Stafford — Tue, 13 Sep 2011 02:05:21 +0000

Thanks. I didn't fully understand the issue until reading your post. Made it very clear.

By: peter

peter — Sat, 28 Aug 2010 01:08:31 +0000

I guess I was taking the meaning of recursive too literally. It looks like in f sharp a function marked as recursive does not have to call itself.

The code below does what we want, ie calling the f2 function before it is defined.
let rec f1 () =
printfn "in f1"
f2()
and f2 () =
printfn "in f2"

If you add a line at the end calling f1() from f2 it also works and forms and unending loop

But I don't know how to do the equivalent in javascript

By: peter

peter — Fri, 27 Aug 2010 20:35:31 +0000

Thomas,

Unfortunately, I don't know.
I came to this site looking for an answer to that very question

F sharp has a construction called "and" where you declare function a and function b joined by "and", thus informing the compiler that function a will recursively call function b and vice versa

However I haven't figured out how to deal with the (simpler) case you describe where function a needs to call function b and vice versa in a non recursive way

Perhaps you join both functions together using some higher order function.

If anyone has any ideas I would be grateful to hear them

By: thomasperi

thomasperi — Wed, 25 Aug 2010 22:49:42 +0000

Peter, what do you disagree with?

How would you suggest we go about writing two functions that recursively call each other? It is necessary for one function to be placed before the other in code; therefore, the invocation of one of the two functions must take place at a position in the file that is earlier than the position at which that function is defined.

How is it done in F Sharp?

By: peter

peter — Wed, 25 Aug 2010 21:29:33 +0000

I disagree. I think what you are suggest might be useful, but you are in a sense tricking jslint.
Douglas Crockford says that he expects functions to be defined before they are used (note the function, not the variable)

Also newer functional languages such as f sharp also demand that functions are defined before they are used

By: Brandon Thomson

Brandon Thomson — Sun, 20 Sep 2009 15:16:20 +0000

Thanks, this helped me get a better perspective on the JSLint error. I think I am going to restructure my code to use variable declarations like you describe here.

By: Angel

Angel — Tue, 02 Jun 2009 22:46:56 +0000

Thanks for the awesome tip...i've been racking my brain trying to get my perfectly working scripts to validate with jslint haha

By: Pirkka Hartikainen

Pirkka Hartikainen — Thu, 07 May 2009 11:45:12 +0000

Thanks, this helped me out too! I couldn't figure out what was so bad about not having my functions declared in a certain (and impossible to reach) order.

By: Hatem Nassrat

Hatem Nassrat — Sat, 28 Feb 2009 22:18:57 +0000

Thank you my friend. This drove me crazy. I just now found out the right way to declare the function handle before writing the implementation.