Ruby - Count characters excluding whitespace

Introduction

strings have a gsub method that performs a global substitution upon the string. For example:

"this is a test".gsub(/t/, 'X')  # Xhis is a XesX 

You can use gsub to eradicate the spaces from your text string.

Then use the length method to get the length of the text.

Demo

lines = File.readlines("main.rb") 
line_count = lines.size #  w ww . j  a  va 2s  .c o  m
text = lines.join 
total_characters_nospaces = text.gsub(/\s+/, '').length 
puts "#{total_characters_nospaces} characters excluding spaces"

Result

Related Topic

• Output text file line by line
• Count text file line
• Read whole text file to memory
• Count Text File Characters
• Counting Words in Text File
• Counting Sentences and Paragraphs in Text file
• Standard Input and Output
• Text Files Reading
• Split file by ,
• Output file byte by type
• Read text file character by character
• Read an I/O stream line by line using gets
• Read entire file into an array, split by lines, using readlines
• Read an arbitrary number of bytes from a file
• Reading text file line by line using each
• Read file in UTF8
• Transcoding from one encoding to another encoding.

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