Ahh, this is the best one looking yet! :-)
On Feb 18, 1:45 pm, Jeff Valk wrote:
> Here's another.
>
> (defn remove-at [v & idxs]
> (vec (for [i (range (count v)) :when (not ((set idxs) i))] (v i
>
> - Jeff
>
And this one is definitely the fastest one:
> On Wednesday 18 February 2009 12:0
Here's another.
(defn remove-at [v & idxs]
(vec (for [i (range (count v)) :when (not ((set idxs) i))] (v i
- Jeff
On Wednesday 18 February 2009 12:07, Chouser wrote:
>
> On Wed, Feb 18, 2009 at 12:30 PM, Telman Yusupov wrote:
>
> No prettier, but a bit faster:
>
> (defn remove-at42 [
On Wed, Feb 18, 2009 at 12:30 PM, Telman Yusupov wrote:
>
> I'm not sure which version is more idiomatic, but the last one seems
> to give me the best performance out of all versions.
No prettier, but a bit faster:
(defn remove-at42 [coll & indexes]
(let [iset (set indexes)]
(loop [i (int
I tried to get the results using some clever one liner but couldn't
come up with it. It looks like rolling your own function is the way to
go (but I would love to see this proven wrong).
It would be very helpful if there were a function that does vector
difference, like the one for sets. For exam
Vectors are designed for contiguous/sequential data. The case below requires
"removing" elements at arbitrary (keyed) locations in a collection.
Idiomatically, a map is better suited to the job. With a vector you'll be left
reassembling your key.
It's worth noting that calling assoc on a vecto
On Feb 18, 5:38 am, CuppoJava wrote:
> (defn remove_at [coll & indexes]
> (map second
> (remove #(some #{(first %)} indexes) (map vector (iterate inc
> 0) coll
I'd have thought you could use dissoc, but it seems that only assoc
works with vectors. I wonder if this is an oversight or
My point was that you could use subvec to do vector splicing and build your
remove function off of that. I'm sure the more experienced Clojurians can
chime in on what is the most idiomatic form.
On Wed, Feb 18, 2009 at 1:10 AM, CuppoJava wrote:
>
> Mmm, subvec doesn't quite seem to do the same t
Mmm, subvec doesn't quite seem to do the same thing.
I want a function that removes certain indexes of a vector:
eg. (remove_at [1 2 3 4 5 6] 0 3) => [2 3 5 6]
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Is using subvec for something like this a bad idea?
On Wed, Feb 18, 2009 at 12:38 AM, CuppoJava wrote:
>
> Hi,
> I'm wondering if there's a terser more idiomatic way to write the
> following. I want to get a new vector with the specified indexes
> removed. I found myself doing this often enough t
