Add bin and edit workflow

bin/gems/facets-3.1.0/lib/standard/facets/fileutils/slice.rb

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+require 'fileutils'
+
+module FileUtils
+
+  module_function
+
+  # In block form, yields lines +from+-+to+.  In non-block form, returns
+  # an array of lines +from+-+to+:
+  #
+  #   # Returns lines 8-12 of 'myfile'
+  #   FileUtils.body("myfile",8,12)
+  #
+  # CREDIT Shashank Date, via Daniel Berger.
+
+  def slice(filename,from,to) #:yield:
+    IO.readlines(filename)[from-1..to-1]
+  end
+
+  # In block form, yields the first number of +lines+ of file +filename+.
+  # In non-block form, it returns an array of the first number of +lines+:
+  #
+  #   # Returns first 10 lines of 'myfile'
+  #   FileUtils.head("myfile", 10)
+  #
+  def head(filename,lines) #:yield:
+    a = []
+    IO.foreach(filename){|line|
+        break if lines <= 0
+        lines -= 1
+        if block_given?
+          yield line
+        else
+          a << line
+        end
+    }
+    return a.empty? ? nil : a
+  end
+
+  # In block form, yields the last number of +lines+ of file +filename+.
+  # In non-block form, it returns the lines as an array.
+  #
+  # Note that this method slurps the entire file, so I don't recommend it
+  # for very large files. If you want an advanced form of +tail+, I
+  # suggest using file-tail, by Florian Frank (available on the RAA):
+  #
+  #   # Returns last 3 lines of 'myfile'
+  #   FileUtils.tail("myfile",3)
+  #
+  # And no tail -f.
+  def tail(filename,lines) #:yield
+    IO.readlines(filename).reverse[0..lines-1].reverse
+  end
+
+end
+