From: STEPHEN BECKER I V <Becker004@...>
Date: 2004-09-28T23:13:52+09:00
Subject: rindex with array of arrays

Should rindex work for an array of arrays? I am starting the playfair
cypher, you get a key and append the alphabet to it then remove dups
and change J to I, then make that in to a matrix .

mat[0].rindex("b") works right 
but not
mat.rindex("b")  
Do i need a string match type of thing?


####code
def removedup(a)   # i want to change a to an array then use uniq
b=('a'..'z').to_a
a<<b.to_s
a.gsub!("j","i")
a.gsub!(/\s/, '')
       loc=0
	while loc<a.size
		
		for i in loc+1 .. a.size
			a[i]='' if a[loc]==a[i] 
		end
		loc+=1
	end
	
	return a
end

def makematrix(a)
count = 0
    mx = Array.new(5)
    for i in 0 .. (5 - 1)
	row = Array.new(5, 0)
	for j in 0 .. (5 - 1)
	    row[j] = a[count].chr   #make a matrix of the letters in a
	    count += 1
	end
	mx[i] = row
    end
    return mx
end

print "Enter a key: "
a=gets.downcase

print removedup(a)
tmat=makematrix(a)
print tmat.rindex("x") # will this work?
####code