Can I create an array in Ruby with default values?

Question

Perl is pretty nice about default values:

: jmglov@laurana; perl -e \'@foo; printf \"%d\\n\", $foo[123]\'
0
: jmglov@laurana; perl -e \'%foo; printf \"%d\\n\         


        

Answer 1

If you're dealing with integers you can call to_i:

foo = []
foo[100]
#=> nil
foo[100].to_i
#=> 0
foo[100] = 3
foo[100]
#=> 3

UPD

Oh, I didn't read all topic :)

so you can use this:

foo.inject{|a,b| a.to_i + b.to_i }

which, actually, not the smartest one