Hi,
I am new to Ruby and come form C language.
Can someone pint out for me my mistake please.
It seem not to find the file ever no regardless of the path.
class Scan
attr_reader :filename, :alpha_count, :digit_count,
:non_printable_count, :line_count, :word_count, :symbol_count
attr_writer :filename, :alpha_count, :digit_count,
:non_printable_count, :line_count, :word_count, :symbol_count
filed_ptr=0
def initialize(filename)
@filename=filename
@alpha_count=0
@digit_count=0
@symbol_count=0
@non_printable_count=0
@blank_count=0
@line_count=0
@word_count=0
end #initialize
def open_count
printf( “filenamae= %s\n”,@filename)
file_ptr=File.open(@filename,“r”) do |file|
file.each_byte do |ch|
case ch.to_i
when 32
@blank +=1
when 0…31
@non_printtable_count+=1
when 48…57
@digit_count +=1
when 65…90 ,97…122
@alpha_count +=1
when -1
puts “Found End of file”
else @symbol_count +=1
end #case
end #each_byte
file_ptr.close
end #open
end #open_count
end #class
print “Enter the path and file name ej. /home/user1/file.txt :->”
fname=gets
ff=Scan.new(fname)
ff.open_count()
Luis E. wrote the following on 27.09.2007 21:34 :
Hi,
I am new to Ruby and come form C language.
Can someone pint out for me my mistake please.
It seem not to find the file ever no regardless of the path.
[…]
print “Enter the path and file name ej. /home/user1/file.txt :->”
fname=gets
Quick guess :
fname=get.chomp
On Sep 27, 2007, at 3:34 PM, Luis E. wrote:
filed_ptr=0
end #initialize
@non_printtable_count+=1
end #open
end #open_count
end #class
print “Enter the path and file name ej. /home/user1/file.txt :->”
fname=gets
ff=Scan.new(fname)
ff.open_count()
Here are some other ways you can make your code more Ruby-like:
#! /usr/bin/env ruby -w
class Scan
# use attr_accessor instead of attr_reader and attr_writer
attr_accessor :attr_names, :filename, :alpha_count, :digit_count
attr_accessor :non_printable_count, :line_count, :word_count
attr_accessor :symbol_count
# filed_ptr=0 <-- not needed
def initialize(filename)
@filename=filename
@alpha_count=0
@digit_count=0
@symbol_count=0
@non_printable_count=0
@blank_count=0
@line_count=0
@word_count=0
end #initialize
def open_count
printf( "filename = %s\n",@filename)
File.open(@filename) do |file| # <-- "r" not needed, is default
file.each_byte do |ch|
case ch # <-- to_i not needed
when 32
@blank_count+=1
when 0..31
@non_printable_count+=1
when 48..57
@digit_count+=1
when 65..90,97..122
@alpha_count+=1
when -1
puts "Found End of file"
else @symbol_count+=1
end #case
end #each_byte
# File.open given a block ensures file will be closed
# file_ptr.close <-- not needed
end #open
end #open_count
end #class
print “Enter the path and file name (e.g. /home/user1/file.txt) :->”
s = Scan.new(gets.chomp)
s.open_count # <-- () not needed
p s
filename = /Users/mg/Desktop/test.rb
#
Regards, Morton
isalpha: /[a-zA-Z]/
isspace: /\w/
Regular Expressions are your friend.
Jason
Morton thank you for the advice.
Does Ruby have an equivalent function/method to the C isalpha, isspace
and etc.
all included in #include <ctype.h>?
-L
Jason R. wrote:
isalpha: /[a-zA-Z]/
isspace: /\w/
Regular Expressions are your friend.
Jason
Thanks Jason.
That works but how to put the non printable characters in there?
-L
–
Posted via http://www.ruby-forum.com/.
Hmm, not sure right off hand. What exactly are you trying to do? search
for
certain instances of hex data?
Jason
I am trying to port a parser from c to Ruby. It is a very rudimentary
scanner and there are around 50 tokens.
From my bad code on the first post you can notice I was trying to use
ascii table/code. But it does not get me the same results as my c code.
-L
2007/9/28, Jason R. [email protected]:
isalpha: /[a-zA-Z]/
isspace: /\w/
Regular Expressions are your friend.
Jason
Just a little typo:
isspace: /\s/
On 9/28/07, Luis E. [email protected] wrote:
That works but how to put the non printable characters in there?
-L
Posted via http://www.ruby-forum.com/.
Hmm, not sure right off hand. What exactly are you trying to do? search
for
certain instances of hex data?
Jason