<entry index='e'>
<name>ENV</name>
<reference>environment variable</reference>
<reference>singleton method</reference>
<reference>instance</reference>
<reference>ruby</reference>
<reference>object</reference>
<reference>hash</reference>
<content>
    ((Object)) which operates same as ((Hash))
    to access ((environment variable|Environment Variable)).
    Actually it is an ((instance|Instance)) of the Object class
    which adds a ((singleton method|Singleton Method)).
    When the ((environment variable|Environment Variable)) is changed
    with this object, it is succeeded to the offspring process
    of ((Ruby)).
</content>
</entry>
