NetNews Usenet Archive 1993 #1/NN_1993_1.iso/spool/comp/lang/function/1487

Internet Message Format | 1993-01-06 | 962 b

Path: sparky!uunet!zaphod.mps.ohio-state.edu!uwm.edu!linac!att!att!allegra!alice!ark
From: [e-mail] (Andrew Koenig)
Newsgroups: comp.lang.functional
Subject: Re: Length of Arrays in SML
Message-ID: <[e-mail]>
Date: 6 Jan 93 09:28:50 GMT
Article-I.D.: alice.24561
References: <[e-mail]>
Reply-To: [e-mail] ()
Organization: AT&T Bell Laboratories, Murray Hill NJ
Lines: 16

In article <[e-mail]> [e-mail] (Susan E Smith) writes:

> PROBLEM:  I am using Standard ML (New Jersey), Version 0.66 and I am trying
> to use the Array function "length" to get the length of an array.

The problem is that the built-in function "length" takes a list,
as you found out.  What you want is the "length" in the Array
structure, which is therefore called Array.length:

    val My_Array = arrayoflist ["Hi","My","Name","Is","Bob"];
    Array.length My_Array;

should print 5.
--
                --Andrew Koenig
                  [e-mail]