I’ve had a look at /usr/share/doc/ruby-1.8.4/sample/less.rb and made
some comments on the processes where I could. It came with my repos
installation of Ruby. Can someone point me in the right direction here,
as there a a number of things that I’m not familar with or
there isn’t a single def foo … end method here - why?
also how come this hasn’t been turned into a class?
is that because that there is no need for one?
also why the use of GLOBAL VARIABLES? I thought that they are not
from the “church of good design”
gobal vars to hard-code where these programs are… assuming a
Unix-based system # it was weired because the path was initially set
to /usr/local/bin/ # which did not work
i personally think it’s better to use a ruby equivalent of `which
less` to find out where the command is # rather than hard coding it in
this way ZCAT = “/usr/bin/zcat”
LESS = “/usr/bin/less”
funny how you can call ruby less.rb with --help
dunno about this class or method
FILE = ARGV.pop
ah, i think that this may be exception handling.
if no arguments from command line OPTION is zero
otherwise out an empty string at the end of the filename??
OPTION = (if ARGV.length == 0; “” else ARGV.join(" "); end)
we are grepping for stuff…
a file that ends in Z or gz - these are compressed files
if FILE =~ /.(Z|gz)$/
what is %s?
- is it a string that we come across when we are grepping through
ri kernel.format for the format method
“Argument is a string to be substituted”
i think it works with sprintf
run zcat on a compressed file first then view it with less
exec(format("%s %s | %s %s", ZCAT, FILE, LESS, OPTION))
otherwise there is no compressed file and we treat it differently
elsif FILE == nil
exec(format("%s %s", LESS, OPTION))
print(format("%s %s %s", LESS, OPTION, FILE), “\n”)
exec(format("%s %s %s", LESS, OPTION, FILE))
lessing. i dont know why the use of the empty brackets