Answers the current environment for Smalltalk. This is equivalent to typing env at a UNIX shell prompt.

Gets the environment string association with the specified string. Answers nil if none. This directly maps to the C function getenv().

Answers a new instance of the receiver. The new environment is empty.

Adds the specified string (in the form, aKey=aValue) to the current environment. This directly maps to the C function putenv().

Answers the start-up environment for the user process. This provides a snapshot of the environment in which Smalltalk is running.

Answers the object of the receiver that is associated with an object equivalent to the specified key. Answers nil if the receiver does not contain an object equivalent to the key.

Answers the object of the receiver that is associated with an object equivalent to the specified key. If an equivalent key is not found, answers the result of evaluating the specified zero argument block. Returns fail if the key is not found and if the block is not a zero-argument block.

Associates the specified key with the specified value, in the receiver. Answers the value currently associated with aKey (or nil if absent). If the receiver does not contain the specified key, it creates a new entry in the receiver for that key.

Answers the value at the specified key in the receiver in the form aKey=aValue. If the key is missing, it generates an error.

Answers the value at the specified key in the receiver in the form aKey=aValue. If an equivalent key is not found, answers the result of evaluating the specified zero argument block.

Answers the key-value pair in the receiver, indicated by the specified key. If an equivalent key is not found, answers the result of evaluating the specified zero argument block.

Answers the environment keys in the receiver.