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joeeeeey/read_big_file_and_fliter.rb

Last active January 12, 2018 08:26
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Ruby read big file, filter and delete line.
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read_big_file_and_fliter.rb
output_file_path = "output_file_path"
input_file_path = "input_file_path"
open(input_file_path, 'r') do |f|
open(output_file_path, 'w') do |f2|
f.each_line do |line|
if line != "\n" # logic here
f2.write(line)
end
end
end
end
# If need to replace old file bu new file
FileUtils.mv output_file_path, input_file_path
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joeeeeey commented Jan 12, 2018

reference

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