explode a string to a list
clint.laskowski
What is the best way to iterate through the characters of a string? Is
there some kind of EXPLODE function such that:
=> (explode "test")
(\t \e \s \t)
I did a Google search but the closest thing I found was SUBS:
=>(subs "test" 1 2)
"t"
Chouser
clint.laskowski<clint.l...@gmail.com> wrote:
>
> Sorry if this is a FAQ. I'm a Clojure newbie.
>
> What is the best way to iterate through the characters of a string? Is
> there some kind of EXPLODE function such that:
>
> => (explode "test")
> (\t \e \s \t)
'seq' creates a sequence out of almost anything, including strings:
user=> (seq "test")
(\t \e \s \t)
Note this is a lazy seq, though the laziness doesn't matter
much on a string. A seq is not exactly the same as a list,
but will generally do.
--Chouser
Michel Salim
> What is the best way to iterate through the characters of a string? Is
> there some kind of EXPLODE function such that:
>
> => (explode "test")
> (\t \e \s \t)
>
> I did a Google search but the closest thing I found was SUBS:
>
> =>(subs "test" 1 2)
> "t"
The key rule is that in Clojure, if a data structure can reasonably be
viewed as a sequence, it can be turned into one. Thus
=> (seq "abcde")
(\a \b \c \d \e)
HTH,
--
Michel Salim
Sean Devlin
A String is a form of a Sequence, so the correct function is seq.
user=>(seq "test")
It is an interface most collections implement, and it makes it very
consistent to manipulate any "collection-like" object. For mroe read
here:
http://clojure.org/sequences
Also, watching Rich's presentation for Java and/or Lisp developers
will help a lot.
I hope this helps.
Sean
On Aug 22, 4:54 am, "clint.laskowski" <clint.laskow...@gmail.com>
wrote:
Rich Hickey
>
> Welcome to Clojure!
>
> A String is a form of a Sequence, so the correct function is seq.
>
I think we all need to be very careful about calling things sequences
which are not. seq can give you a sequential view of many things, but
that doesn't make those things sequences. Very few of the Clojure data
structures are actual sequences, e.g. vectors, maps, strings etc are
not. Nor do most Clojure collections implement the sequence (ISeq)
interface. They implement the Seqable interface, which means seq
works, and the thing that seq returns implements ISeq. The fact that
first/rest/other-sequence-fns work on most collections falls out of
the fact that they call seq on their args.
It may seem like a nit, but I've seen a lot of confusion, e.g. people
listing The Sequence Types: Vector, Map etc. Each of the data
structures has important and unique characteristics (insertion, lookup
etc) when not used sequentially. It just makes a mess of the
abstractions to call them sequences.
Rich
Sean Devlin
interfaces.
The correct thing to say is that a String is something seq works on.
On Aug 22, 10:07 am, Rich Hickey <richhic...@gmail.com> wrote:
clint.laskowski
Hickey would respond :-)
-- Clint
On Aug 22, 9:07 am, Rich Hickey <richhic...@gmail.com> wrote:
Conrad
the life of me I can't find a function in any libraries (or any info
in the newsgroup) to do the reverse, i.e. (\t \e \s \t) => "test"...
The closest I can find is (print-str [\t \e \s \t])=>"t e s t"
...can anyone give me a pointer?
Thanks in advance!
On Aug 22, 8:20 am, Sean Devlin <francoisdev...@gmail.com> wrote:
> Welcome to Clojure!
>
> A String is a form of a Sequence, so the correct function is seq.
>
> user=>(seq "test")
> (\t \e \s \t)
>
> The sequence abstraction is on of may favorite things about Clojure.
> It is an interface most collections implement, and it makes it very
> consistent to manipulate any "collection-like" object. For mroe read
> here:
>
> http://clojure.org/sequences
>
> Also, watching Rich's presentation for Java and/or Lisp developers
> will help a lot.
>
> I hope this helps.
> Sean
>
> On Aug 22, 4:54 am, "clint.laskowski" <clint.laskow...@gmail.com>
> wrote:
>
> > Sorry if this is a FAQ. I'm a Clojure newbie.
>
Conrad
the answer is (apply str [\t \e \s \t])