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U:RDoc::NormalClass[iI"ENV:ET@I"Object;To:RDoc::Markup::Document:@parts[o;;[&o:RDoc::Markup::Paragraph;[I";ENV is a hash-like accessor for environment variables.;To:RDoc::Markup::BlankLine�S:RDoc::Markup::Heading:
leveli:	textI"*Interaction with the Operating System;T@o;	;[I"PThe ENV object interacts with the operating system's environment variables:;T@o:RDoc::Markup::List:
@type:BULLET:@items[o:RDoc::Markup::ListItem:@label0;[o;	;[I"sWhen you get the value for a name in ENV, the value is retrieved from among the current environment variables.;To;;0;[o;	;[I"zWhen you create or set a name-value pair in ENV, the name and value are immediately set in the environment variables.;To;;0;[o;	;[I"hWhen you delete a name-value pair in ENV, it is immediately deleted from the environment variables.;T@S;;i;
I"Names and Values;T@o;	;[I",Generally, a name or value is a String.;T@S;;i	;
I"Valid Names and Values;T@o;	;[I"5Each name or value must be one of the following:;T@o;;;;[o;;0;[o;	;[I"A String.;To;;0;[o;	;[I"|An object that responds to \#to_str by returning a String, in which case that String will be used as the name or value.;T@S;;i	;
I"Invalid Names and Values;T@o;	;[I"A new name:;T@o;;;;[o;;0;[o;	;[I"!May not be the empty string:;To:RDoc::Markup::Verbatim;[I"ENV[''] = '0'
;TI"?# Raises Errno::EINVAL (Invalid argument - ruby_setenv())
;T:@format0o;;0;[o;	;[I"0May not contain character <code>"="</code>:;To;;[I"ENV['='] = '0'
;TI"@# Raises Errno::EINVAL (Invalid argument - ruby_setenv(=))
;T;0o;	;[I"A new name or value:;T@o;;;;[o;;0;[o;	;[I"?May not be a non-String that does not respond to \#to_str:;T@o;;[	I"ENV['foo'] = Object.new
;TI"G# Raises TypeError (no implicit conversion of Object into String)
;TI"ENV[Object.new] = '0'
;TI"G# Raises TypeError (no implicit conversion of Object into String)
;T;0o;;0;[o;	;[I"9May not contain the NUL character <code>"\0"</code>:;T@o;;[	I"ENV['foo'] = "\0"
;TI"Q# Raises ArgumentError (bad environment variable value: contains null byte)
;TI"ENV["\0"] == '0'
;TI"P# Raises ArgumentError (bad environment variable name: contains null byte)
;T;0o;;0;[o;	;[I"QMay not have an ASCII-incompatible encoding such as UTF-16LE or ISO-2022-JP:;T@o;;[	I"<ENV['foo'] = '0'.force_encoding(Encoding::ISO_2022_JP)
;TI"f# Raises ArgumentError (bad environment variable name: ASCII incompatible encoding: ISO-2022-JP)
;TI"<ENV["foo".force_encoding(Encoding::ISO_2022_JP)] = '0'
;TI"f# Raises ArgumentError (bad environment variable name: ASCII incompatible encoding: ISO-2022-JP)
;T;0S;;i;
I"About Ordering;T@o;	;[I"<ENV enumerates its name/value pairs in the order found ;TI"6in the operating system's environment variables. ;TI"UTherefore the ordering of ENV content is OS-dependent, and may be indeterminate.;T@o;	;[I"This will be seen in:;To;;;;[o;;0;[o;	;[I"&A Hash returned by an ENV method.;To;;0;[o;	;[I"-An Enumerator returned by an ENV method.;To;;0;[o;	;[I"<An Array returned by ENV.keys, ENV.values, or ENV.to_a.;To;;0;[o;	;[I"(The String returned by ENV.inspect.;To;;0;[o;	;[I"%The Array returned by ENV.shift.;To;;0;[o;	;[I""The name returned by ENV.key.;T@S;;i;
I"About the Examples;To;	;[I"]Some methods in ENV return ENV itself. Typically, there are many environment variables. ;TI"BIt's not useful to display a large ENV in the examples here, ;TI"Eso most example snippets begin by resetting the contents of ENV:;To;;;;[o;;0;[o;	;[I"?ENV.replace replaces ENV with a new collection of entries.;To;;0;[o;	;[I"ENV.clear empties ENV.;T:
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