Vector: assoc exception

[djcoin]

Hi,
thanks for this awesome lib :)
I'm not a Clojure programmer and didn't look at the clojurescript implementation yet.

Given a vector, I want to get a new vector expect some of its first elements (for now, just the tail of the vector) then replace (or insert on head ) the first element of this new vector.
Here is a failing sample:

var v1 = _.vector(4, 5); 
var v2 = _.rest(v1); // option1
var v2 = _.drop(1, v1);    // option2
var v3 = _.assoc(v2, 0, 'b');

I get a "No protocol method IAssociative.-assoc defined for type object: (5)"

Is this normal, how can I do what I intended to do ?

Thanks a lot,
Best,
Simon

[swannodette]

Yes this isn't a bug, rest and drop and are sequence fns, you'll get back a sequence not a vector. If you want to drop elements and preserve the type look at subvec and pop or use the reducers functionality (sorry not documented yet).

var v1 = _.vector(4, 5); 
var v2 = _.pop(v1);
var v3 = _.assoc(v2, 0, 'b');

[djcoin]

Thanks dnolen for your quick answer :)

I was indeed checking http://clojure.github.io/clojure/clojure.core-api.html#clojure.core/subvec.
pop is in the lib but subvec doesn't seem to be.
Also, I think zipper may help me to do this (pretending i'm using the head of a vector then get a new vector with its head changed).

By the way, I saw that dissoc (among other functions) is not documented. I know it may not be your top priority and that it may be sufficient to look up the clojure doc, just wanted to let you know !

Thanks

[swannodette]

Oops missing subvec is an oversight. I'll also add docs for dissoc. Thanks for the report!

[swannodette]

subvec added and docs for dissoc included as well as a few other missing things.