What is an ENV.size in Ruby?
Overview
We use the size property of the ENV class in Ruby to return the count of environment variables present. It is similar to the length property.
Syntax
ENV.size
Syntax for size property of ENV
Return value
The value returned is an integer that represents the total number of environment variables present.
Code example
# get size of default variablesputs "#{ENV.size}" # 6# clear all environment variablesENV.clear# get size of current variablesputs "#{ENV.size}" # 0# create some environment variablesENV["secret_name"] = "secret"ENV["secret_token"] = "secret"ENV["private_key"] = "code_sync_456"ENV["foo"] = "123"ENV["bar"] = "123"# reprint size of environment variablesputs "#{ENV.size}" # 5
Explanation
- Line 2: We print the size or the number of environment variables present.
- Line 5: We clear all variables using the
clearmethod. - Line 8: We use the
sizeproperty to print the number of environment variables to the console. - Line 11–15: We print new environment variables
- Line 18: We reprint the new size of environment variables to the console.
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