What is ENV.each_value{} in Ruby?
Overview
The each_value{} method of an ENV yields or accesses the value of each environment variable. When it yields each value, we can decide to do anything with it, such as print it, push it to an array, and so on.
Syntax
ENV.each_value{|value|block}
Parameters
value: This is the value of each environment variable yielded by the each_value{} method.
block: This takes each value of the environment variable, value, and allows us to do anything with it.
Example
# create some environment variablesENV["1"] = "One"ENV["payment_key"] = "skdmj234ksdu9"ENV["token_key"] = "3234"# create an empty arrayarr = []# access each value of environment variables# and push to an arrayENV.each_value{|value| arr.push(value)}# print arrayputs "#{arr}"
Explanation
- Line 2–4: We create some environment variables coupled with some system environment variables.
- Line 7: We create an empty array,
arr, that will contain all the values of every environment variable. - Line 11: We use the
each_value{}method. We are able to access all values of the environment variables. Then, we push each value to the array we created previously. - Line 18: We print the array to the console.
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