Object
Any result of command execution is a Filter
.
This class includes Enumerable, therefore a Filter
object can use all Enumerable facilities.
Outputs filter1
, and then filter2
using Join.new
# File shell/filter.rb, line 114 def +(filter) Join.new(@shell, self, filter) end
Inputs from source
, which is either a string of a file name or an IO object.
# File shell/filter.rb, line 50 def <(src) case src when String cat = Cat.new(@shell, src) cat | self when IO self.input = src self else Shell.Fail Error::CantApplyMethod, "<", src.class end end
Outputs from source
, which is either a string of a file name or an IO object.
# File shell/filter.rb, line 68 def >(to) case to when String dst = @shell.open(to, "w") begin each(){|l| dst << l} ensure dst.close end when IO each(){|l| to << l} else Shell.Fail Error::CantApplyMethod, ">", to.class end self end
Appends the output to source
, which is either a string of a file name or an IO object.
# File shell/filter.rb, line 90 def >>(to) begin Shell.cd(@shell.pwd).append(to, self) rescue CantApplyMethod Shell.Fail Error::CantApplyMethod, ">>", to.class end end
Iterates a block for each line.
# File shell/filter.rb, line 38 def each(rs = nil) rs = @shell.record_separator unless rs if @input @input.each(rs){|l| yield l} end end
# File shell/filter.rb, line 30 def input=(filter) @input = filter end
# File shell/filter.rb, line 130 def inspect if @shell.debug.kind_of?(Integer) && @shell.debug > 2 super else to_s end end
# File shell/filter.rb, line 118 def to_a ary = [] each(){|l| ary.push l} ary end