Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.java.programmer > #9257

Re: How to check if the n-th part of an array of Strings exist?

Show all headers | View raw

Gene Wirchenko <genew@ocis.net> writes:

>>I'd wager that refusing to compile is more useful than meaning
>>something useless and confusing, therefore errors-prone.
>
>      It is neither useless nor confusing.  That notation is used in
> math.  For example:
>           Let x, y, and z be integers with x < y < z.
> I think it clearer than
>           Let x, y, and z be integers with x < y and y < z.
> The verbosity does not gain anything.
>
>      ISTR a programming language that did allow this construct.  I
> would like to see it more commonly used.

Nearly all Lisps support that.

,----[ Clojure ]
| user> (doc <)
| -------------------------
| clojure.core/<
| ([x] [x y] [x y & more])
|   Returns non-nil if nums are in monotonically increasing order,
|   otherwise false.
| nil
| user> (< 1 2.4 30 111 9e10)
| true
| user> (< 0)
| true ;; Of course, all nums are in monotonically increasing order
`----

,----[ Common Lisp ]
| * (describe #'<)
| 
| #<FUNCTION <>
|   [compiled function]
| 
| Lambda-list: (NUMBER &REST MORE-NUMBERS)
| Derived type: (FUNCTION (T &REST T) (VALUES (MEMBER NIL T) &OPTIONAL))
| Documentation:
|   Return T if its arguments are in strictly increasing order, NIL otherwise.
| Source file: SYS:SRC;CODE;NUMBERS.LISP
| * (< 1 10 16 99 189)
| 
| T
| * (< 1)
|
| T ;; Of course, all arguments are strictly in intreasing order
`----

,----[ Scheme ]
| #;> (< -1 0 19 93 321 1000)
| #t
| #;> (< 1)
| Error in <: incorrect number of arguments to procedure
`----

Bye,
Tassilo

Back to comp.lang.java.programmer | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

How to check if the n-th part of an array of Strings exist? jochen2@brenz.com (Jochen Brenzlinger) - 2011-10-25 16:26 +0000
  Re: How to check if the n-th part of an array of Strings exist? Tom McGlynn <taqmcg@gmail.com> - 2011-10-25 09:41 -0700
  Re: How to check if the n-th part of an array of Strings exist? Wojtek <nowhere@a.com> - 2011-10-26 23:37 -0700
    Re: How to check if the n-th part of an array of Strings exist? Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2011-10-27 10:20 +0300
      Re: How to check if the n-th part of an array of Strings exist? Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-10-27 07:26 -0400
        Re: How to check if the n-th part of an array of Strings exist? Tim Slattery <Slattery_T@bls.gov> - 2011-10-27 09:09 -0400
          Re: How to check if the n-th part of an array of Strings exist? Mayeul <mayeul.marguet@free.fr> - 2011-10-27 15:45 +0200
            Re: How to check if the n-th part of an array of Strings exist? Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2011-10-27 16:55 +0300
            Re: How to check if the n-th part of an array of Strings exist? Gene Wirchenko <genew@ocis.net> - 2011-10-27 10:37 -0700
              Re: How to check if the n-th part of an array of Strings exist? Tassilo Horn <tassilo@member.fsf.org> - 2011-10-27 21:31 +0200
            Re: How to check if the n-th part of an array of Strings exist? Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-10-27 21:25 -0400
              Re: How to check if the n-th part of an array of Strings exist? Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2011-10-28 10:08 +0300
  Re: How to check if the n-th part of an array of Strings exist? Roedy Green <see_website@mindprod.com.invalid> - 2011-10-28 06:20 -0700
  Re: How to check if the n-th part of an array of Strings exist? Arne Vajhøj <arne@vajhoej.dk> - 2011-11-06 14:54 -0500

csiph-web