1. Re: comparing sequences
Paul Kerslake wrote:
> Is there a way to compare 2 objects like so:
Rather than using objects, you probably should declare your lists as
sequences.
The basic methods for comparing sequences as if they were strings are:
equal( o1, o2 )
For example:
if equal( "money, it's a gas", "money, it's all cash" ) then
...
If you want to do a greater than/less than sort of comparisons, use:
compare( o1, o2 )
For example:
procedure compare_strings( sequence s1, sequence s2 )
integer result
result = compare( s1, s2 )
if result = 0 then
puts( 1, "%s and %s are the same\n", {s1, s2} )
elsif result = -1 then
puts( 1, "%s is less than %s\n", {s1, s2} )
else
puts( 1, "%s is greater than %s\n", {s1, s2} )
end if
end procedure
compare_strings( "led zepplin", "pink floyd" )
To check for the length of a sequence, you can use:
length( s )
For example:
ledzepsong={"theres a lady in short",
"all that glitters is gold",
"and she's buying a ",
"stairway to heaven....."}
printf( "There are %d lines in the song\n", {length( ledzepsong} )
which is sometimes abbreviated to:
if not length( s ) then ...
I hope this helps!
-- David Cuny
