Thanks Josef, I shall digest that reply very closely. I had actually
initially tried assoc on the string as you described.
(You guys are great. This is why Im really enjoying learning clojure.)
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To pos
It all boils down to the fact that strings are immutable and are not
persistent.
What I was trying to say is that the operation of replacing one character
with another in an immutable and non persistent string is not a common one
and may be a sign of bad design. I was not commenting on the replace
Concatenation, replacing occurrences by another value, formatting
values within a string are quite common.
Playing with indexes within a string ? I rarely used this in the last 15 years.
In the old days yes since space was at premium, many languages did not
support dynamic allocations, speed was
Thanks Josef, but could you explain a bit more. Are you saying that the
operation of replacing a substring (by index & length) with another
substring is not a common operation?
i.e.
(defn replace-substring [s r start len] (str (subs s 0 start) r (subs s (+
len start
If so, that does supr
No. IMO this is not a common operation and should not be in core. If you
need do it a lot, you should not use java string in the first place.
What should be included in core is a transient string, with support for
assoc!.
Jozef
On Wed, Apr 2, 2014 at 7:49 PM, Andy Smith wrote:
> just a shame i
just a shame its not in the core, no?
On Wednesday, 2 April 2014 18:06:03 UTC+1, A. Webb wrote:
>
> Using subs (no need for join) is the way I would go, just define
>
>
> (defn replace-at [s n c] (str (subs s 0 n) c (subs s (inc n
>
> (replace-at "hello" 1 "a") ;=> "hallo"
>
> and ca
Using subs (no need for join) is the way I would go, just define
(defn replace-at [s n c] (str (subs s 0 n) c (subs s (inc n
(replace-at "hello" 1 "a") ;=> "hallo"
and carry on.
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To po
I guess my point is that if the java function is so good, then why doesnt
the clojure library thinly wrap it, so that your code remains portable
clojure?
On Wednesday, 2 April 2014 12:50:00 UTC+1, guns wrote:
>
> On Wed 2 Apr 2014 at 04:06:40AM -0700, Andy Smith wrote:
>
> > If there is nothi
On Wed 2 Apr 2014 at 04:06:40AM -0700, Andy Smith wrote:
> If there is nothing better then I wonder why there isn't something
> like this in the clojure standard libraries (must be a good reason I
> suppose)? Its a fairly standard function for a string library isnt it?
It would be a terrible fun
about 1. if that's meant to be portable, yes, not the best indeed, but if
you look at c.c.string/* or even c.c/str, most of the functions use
stringbuilder I think.
about 2. probably slower than subs, these are just alternatives to what you
suggested
On Wednesday, April 2, 2014 1:06:40 PM UTC+2
the first isnt pure clojure wo I would probably try to avoid this... e.g.
what if I want to port to clojureCLR?
The second 'looks' quite a roundabout way of simply manipulating a string?
How would the following compare for performance?
(defn replace-substring [s r start len] (str (subs s 0 star
There are many ways to do this, these 2 come to mind:
(doto (StringBuilder. "abc") (.setCharAt 2 \d))
(apply str (assoc (vec "abc") 2 "d"))
The former is probably a lot faster (uglier too)...
On Wednesday, April 2, 2014 12:10:48 PM UTC+2, Andy Smith wrote:
>
> Hi,
>
> I see there are a lot of
Hi,
I see there are a lot of functions strings, but nothing that allows me to
create a new string with a character replaced at a given index? Am I meant
to use subs and join to do this? It seems a bit long-winded? I wonder why
there isnt a helper function out of the box to do this (or is there?
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