Unzip a Single File by Index

Unzip a single file by index.

Downloads for Windows/Linux and Install Instructions

require 'rubygems'
require 'chilkat'

zip = Chilkat::CkZip.new()

#  Any string unlocks the component for the 1st 30-days.
success = zip.UnlockComponent("Anything for 30-day trial")
if (success != true)
    print zip.lastErrorText() + "\n"
    exit
end

success = zip.OpenZip("my_photos.zip")
if (success != true)
    print zip.lastErrorText() + "\n"
    exit
end

#  How many files and directory entries are in this .zip?

n = zip.get_NumEntries()
print "Num entries = " + n.to_s() + "\n";

#  Let's say we want to unzip the 3rd entry:

entry = zip.GetEntryByIndex(2)
if (entry == nil )
    print "Index out of range!" + "\n"
    exit
else
    #  Unzip it to C:/myTempDir
    success = entry.ExtractInto("c:/myTempDir")
    if (success != true)
        print entry.lastErrorText() + "\n"
        exit
    else
        print "Extracted 1 file!" + "\n"
    end

end