Getenv: return empty string instead of <undefined>#188
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Signed-off-by: Piotr Bocheński <piotr@bochen.ski>
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What
Getenvshould check if variable is defined before returning it's value as string.Motivation
To figure our if the environment variable was set or not, user code needs to check if the string not equals
<undefined>. This requires the user to know the internals of the library which we should avoid.