1.64.2 Dictionary: accessing

add: newObject

Add the newObject association to the receiver

addAll: aCollection

Adds all the elements of ’aCollection’ to the receiver, answer aCollection

associationAt: key

Answer the key/value Association for the given key. Fail if the key is not found

associationAt: key ifAbsent: aBlock

Answer the key/value Association for the given key. Evaluate aBlock (answering the result) if the key is not found

associations

Returns the content of a Dictionary as a Set of Associations.

at: key

Answer the value associated to the given key. Fail if the key is not found

at: key ifAbsent: aBlock

Answer the value associated to the given key, or the result of evaluating aBlock if the key is not found

at: aKey ifAbsentPut: aBlock

Answer the value associated to the given key. If the key is not found, evaluate aBlock and associate the result to aKey before returning.

at: aKey ifPresent: aBlock

If aKey is absent, answer nil. Else, evaluate aBlock passing the associated value and answer the result of the invocation

at: key put: value

Store value as associated to the given key

atAll: keyCollection

Answer a Dictionary that only includes the given keys. Fail if any of them is not found

keyAtValue: value

Answer the key associated to the given value, or nil if the value is not found

keyAtValue: value ifAbsent: exceptionBlock

Answer the key associated to the given value. Evaluate exceptionBlock (answering the result) if the value is not found. IMPORTANT: == is used to compare values

keys

Answer a kind of Set containing the keys of the receiver

values

Answer an Array containing the values of the receiver