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Question: Probllem with member() and table()

Question:Probllem with member() and table()

tomleslie 13821 Maple 2019
table member
October 09 2019
1
  1. The member() function doesn't find the value in a table if that value is associated with the key (aka index)  '0'
  2. Doesn't seem to matter if the table is created explicitly (ie by calling table()) or implicitly (ie by simple indexed assignment)
  3. member() doesn't seem to have the same issue with a zero-based Array()
  4. I'm pretty sure that this is a bug, but I'd like some opinions before I report it
  5. This behaviour has been around for a while: same thing happens all the way back to Maple 18. (I can't check anything earlier)

Check the ouput of member(10,t1) in the attached

> 

  restart:
> 

  interface(version);

`Standard Worksheet Interface, Maple 2019.1, Windows 7, May 21 2019 Build ID 1399874`

 (1)
> 

#
# Explicit table creation: same thing
# happens if table is created "implicitly"
#
  t1:=table([0=10, 1=12]);
  member(10,t1);
  member(12,t1);

table( [( 0 ) = 10, ( 1 ) = 12 ] )

  

false

  

true

 (2)
> 

#
# Zero-based Array
#
  A:=Array(0..1, [10, 12]);
  member(10,A);
  member(12,A);

Array(%id = 18446744074528920750)

  

true

  

true

 (3)
> 

 

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