Ruby Question

[Kyle Sexton]

All,

I'm struggling with a hopefully simple problem in one of my programs.
Given an block of text that can be any length in size:

str =<<EOF
ebdcgfa
eadbcfg
dcbeagf
fecdbga
gfabecd
egabcdf
agdfebc
bdcegfa
abgcdef
ceagdfb
egbfdca
dbcgfea
EOF

I'd like to have the output be:

str1 = "1 ebdcgfa 2 eadbcfg 3 dcbeagf 4 fecdbga"
str2 = "5 gfabecd 6 egabcdf 7 agdfebc 8 bdcegfa"
str3 = "9 abgcdef 10 ceagdfb 11 egbfdca 12 dbcgfea"

Each new string variable will have a chunk of four links from the
input block, prefaced with the line number of the block. I don't need
str1, str2, str3 to be string type if some other type works better,
just a way to reference them in order. Input block size can range
from 0 to some large number, say 100000. What's a clean way to do
this? I considered dumping all of the original block into an array,
but I'm not sure if arrays are designed for manipulating that many
elements.

I feel like I'm missing something and this is probably easier than my
loops with counting iterators, but maybe not. :)

Thanks,
Kyle Sexton

[Greg Hansen]

Kylie,

Looks like this should work.

index = []

str.split("\n").each_with_index {|s,i| index << "#{i} #{s}"}

index.each_slice(4) {|s| p s}

Hope that helps.

Greg

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[Andy Ogzewalla]

If you are concerned about input size/memory usage/performance then it is probably best to do some "low-level" string manipulation with loops and counters like you are talking about.

On Fri, Feb 3, 2012 at 9:48 PM, Kyle Sexton <k...@mocker.org> wrote: