Ruby check if variable exists in a file -

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i have text file of 1 word per line.

i want check if ruby variable exists on lines in file.

@username = john

and in bannedwords.txt:

alex adam mary john james

so true. best function use in ruby this?

just read in file , convert set can use test inclusion:

require 'set' banned = set.new(file.readlines('bannedwords.txt').collect(&:chomp))  banned.include?('john') # => true  banned.include?('papa smurf') # => false

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