Class: FileIterator::FileIterator

Inherits:
Object
  • Object
show all
Defined in:
lib/file_iterator.rb

Instance Method Summary collapse

Constructor Details

#initialize(input = nil, output = ARGV[1]) ⇒ FileIterator

Returns a new instance of FileIterator.



5
6
7
8
9
10
11
12
13
14
15
16
 
# File 'lib/file_iterator.rb', line 5

def initialize(input = nil, output = ARGV[1])
	@outputfile = output
	if input
	    @inputfile = input
	else
		@inputfile = ARGV[0]
		unless @inputfile
		  puts "usage: #{__FILE__} inputfile [outputfile]"
		  exit 1
	    end
	end
end

Instance Method Details

#iterate ⇒ Object 



18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
 
# File 'lib/file_iterator.rb', line 18

def iterate
	File.open(@inputfile,'r') do | file|
		begin
			if (@outputfile)
				out = File.open(@outputfile,'w')
			else
				out = $stdout
			end
			file.each_line do | line |
				yield(line, out)
			end
		rescue
			raise
		ensure
			out.close if @outputfile
		end
	end
end

#to_a ⇒ Object 



36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
 
# File 'lib/file_iterator.rb', line 36

def to_a
	File.open(@inputfile,'r') do | file|
		result = []
		begin
			if (@outputfile)
				out = File.open(@outputfile,'w')
			else
				out = $stdout
			end
			file.each_line do | line |
				if block_given?
				  result << yield(line)
				else
				  result << line
				end
			end
		rescue
			raise
		ensure
			out.close if @outputfile
		end
		result
	end		
end