Wow, quick responses 
No, i don't know about PP. I am just accustomed to having serious
output formatting control in fortran, c & derivitives, etc. for
printing ints, floats, hex, padding, ... Its probably here, I just
don't know where it is.
harp:~ > irb
irb(main):001:0> printf "%s\n", "foobar"
foobar
irb(main):002:0> printf "%b\n", 42
101010
irb(main):004:0> puts( '|' << ('%s' % 'foobar').center(42) << '|')
> foobar |
all the printf modifiers, and more, are there. class string also has many
formatting features.
I just extend the class for each individual program. I wrote the resize so
I don't have to worry about what arrays I pass into the function.
resize(n,def) just .clear's it and stuffs a bunch of 'def' in to up to size
n. I haven't yet writting large ruby programs, so no experience worrying
about things.
Array *index* wrapping is useful in some cases (fibonacci numbers with
no extra assignments). However, most of the time when I accidentially
go past the lower bounds I would like to know since a[x-1] wasn't
intended to set the value at a[9], but since x was zero it did.
nums = [1,2,3] # nums[-1] = 3 mums[2] = 3, nums[-2] = 2, etc
def calc_fib(n)
a = [0,1,0]
for i in 2..n
k = i%3
a[k] = a[k-1] + a[k-2]
end
return a[n%3]
end
harp:~ > cat a.rb
class Array
alias_method '__idx__', ''
def *a, &b
n = a.first
raise RangeError, "negative index <#{ n }>" if Numeric === n and n < 0
send '__idx__', *a, &b
end
end
a =
a << 42
p a[0]
p a[0, 1]
p a[0 .. 0]
p a[-1]
harp:~ > ruby a.rb
42
[42]
a.rb:6:in `': negative index <-1> (RangeError)
from a.rb:16
hth.
-a
···
On Wed, 5 Oct 2005, Andrew Backer wrote:
--
email :: ara [dot] t [dot] howard [at] noaa [dot] gov
phone :: 303.497.6469
Your life dwells amoung the causes of death
Like a lamp standing in a strong breeze. --Nagarjuna
===============================================================================
Yes. You can also pass in arrays (whose contents can be changed). I