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How to get the length of environment variables in Ruby
okwudili onyejiaku
Overview
The length of environment variables is the total number of all environment variables present. In other words, this is the count of all environment variables. We can use the length property to get this number.
Syntax
ENV.length
Syntax for length property of ENV in ruby
Return value
The value returned is an integer that represents the number of environment variables present.
Code example
# Getting the length of default variables
puts "#{ENV.length}" # 6
# Clearing all environment variables
ENV.clear
# Getting the length of current variables
puts "#{ENV.length}" # 0
# Creating some environment variables
ENV["secret_name"] = "secret"
ENV["secret_token"] = "secret"
ENV["private_key"] = "code_sync_456"
ENV["foo"] = "123"
ENV["bar"] = "123"
# Reprinting the length of environment variables
puts "#{ENV.length}" # 5Getting the length of the environment variables present
Explanation
- Line 2: We print the length of environment variables present.
- Line 5: We clear all variables using the
clearmethod. - Line 8: We print the new length of environment variables to the console.
- Lines 11–15: We print some new environment variables to the console.
- Line 18: We print the new length to the console.
RELATED TAGS
env
ruby
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okwudili onyejiaku
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