Need help with Ruby Scipt on Mac

Ruby
1

I can’t seem to get this to work, I think it may not see the
‘my_file.txt’ in the folder because I am on a Mac?

Here is the script:

hidden_text.rb

devdaily.com

feel free to use this program however you like.

def get_file_as_string(filename)
data = ‘’
f = File.open(filename, “r”)
f.each_line do |line|
data += line
end
return data
end

def print_odd(count)
return true if count.modulo(2) != 0
return false
end

def print_even(count)
return true if count.modulo(2) == 0
return false
end

#------------ word-based output ----------------#

def print_even_words(text)
words = text.split
count = 1
words.each { |w|
print w if print_even(count)
print " "
count = count + 1
}
end

def print_odd_words(text)
words = text.split
count = 1
words.each { |w|
print w if print_odd(count)
print " "
count = count + 1
}
end

def print_nth_words(text, n, offset=0)
words = text.split
count = offset
while (count < words.length-offset) do
print words[count]
print " "
count = count + n
end
end

def print_fib_words(text)
words = text.split
fib_last = 1
fib_older = 1
fib_next = 1
while (fib_next < words.length) do
print words[fib_next-1]
print " "
fib_next = fib_last + fib_older #
fib_older = fib_last #
fib_last = fib_next #
return if fib_next >= words.length
end
end

#------------ character-based output ----------------#

def print_odd_chars(text)
words = text.split(//)
count = 1
words.each { |w|
print w if print_odd(count)
count = count + 1
}
end

def print_even_chars(text)
words = text.split(//)
count = 1
words.each { |w|
print w if print_even(count)
count = count + 1
}
end

def print_nth_chars(text, n, offset=0)
words = text.split(//)
count = offset
while (count < words.length-offset) do
print words[count]
count = count + n
end
end

def print_fib_chars(text)
words = text.split(//)
fib_last = 1
fib_older = 1
fib_next = 1
while (fib_next < words.length) do
print words[fib_next-1]
fib_next = fib_last + fib_older
fib_older = fib_last
fib_last = fib_next
return if fib_next >= words.length
end
end

################

MAIN

################

TO-DO: Every method could take an “offset” value.

text = get_file_as_string ‘my_file.txt’

print_odd_words(text)
puts “\n============”
print_even_words(text)
puts “\n============”
print_nth_chars(text,10,1)
puts “\n============”
print_nth_words(text,10)
puts “\n============”
print_fib_words(text)
puts “\n============”
print_fib_chars(text)

2

Source of script is from here:

http://alvinalexander.com/blog/post/ruby/ruby-script-find-hidden-meanings-in-text

3

Hi fables,

when your program doesn’t do what you want it to do, and you’re looking
for some help to figure out why (which is a good idea, btw!) then you
need to supply us with some information about what you expect to happen
and what actually happened. Most people are prepared to help but many
don’t want to have to run your program and do the debugging.

The simplest way to debug is to print the contents of variables:

def get_file_as_string(filename)
data = ‘’
f = File.open(filename, “r”)
f.each_line do |line|

# print the value of each line
puts "debug: #{line}"

data += line

end

print the contents of the file

puts “contents of #{filename}:”
puts “#{data}”

data
end