False

Conditional evaluation: evaluate trueBlock if true, falseBlock if false.

If true, evaluate trueBlock.

If false, evaluate falseBlock.

Logical negation.

Returns true — the receiver is a boolean value.

Examples

true isBoolean         // => true
false isBoolean        // => true

Logical AND with lazy evaluation. Evaluates aBlock only if receiver is true.

Examples

true and: [false]      // => false
false and: [true]      // => false

Logical OR with lazy evaluation. Evaluates aBlock only if receiver is false.

Examples

true or: [false]       // => true
false or: [true]       // => true

Logical XOR. Returns true if exactly one of receiver and other is true.

Examples

true xor: false        // => true
false xor: false       // => false

Override inspect to use printString rather than the field-based format defined in Value. Booleans are primitives, not map-based value objects.

Return a developer-readable string representation showing fields.

Produces ClassName(field: value, ...). Field values are recursively inspected — strings are quoted, nested objects show their own inspect. A class with no fields produces ClassName().

Examples

ValuePoint x: 3 y: 4        inspect   // => "ValuePoint(x: 3, y: 4)"
ValuePoint new              inspect   // => "ValuePoint(x: 0, y: 0)"

Return the class of the receiver.

Examples

42 class              // => Integer
"hello" class         // => String

Test if the receiver is nil. Returns false for all objects except nil.

Examples

42 isNil              // => false
nil isNil             // => true

Test if the receiver is not nil. Returns true for all objects except nil.

Examples

42 notNil             // => true
nil notNil            // => false

If the receiver is nil, evaluate nilBlock. Otherwise return self.

Examples

42 ifNil: [0]         // => 42
nil ifNil: [0]        // => 0

If the receiver is not nil, evaluate notNilBlock with self.

Examples

42 ifNotNil: [:v | v + 1]   // => 43
nil ifNotNil: [:v | v + 1]  // => nil

If nil, evaluate nilBlock; otherwise evaluate notNilBlock with self.

Examples

42 ifNil: [0] ifNotNil: [:v | v + 1]    // => 43
nil ifNil: [0] ifNotNil: [:v | v + 1]   // => 0

If not nil, evaluate notNilBlock with self; otherwise evaluate nilBlock.

Examples

42 ifNotNil: [:v | v + 1] ifNil: [0]    // => 43
nil ifNotNil: [:v | v + 1] ifNil: [0]   // => 0

Return a developer-readable string representation.

Default implementation returns "a ClassName". Subclasses such as Integer, String, and List override this to return richer output.

Examples

42 printString            // => "42"

Return a user-facing string representation for display purposes.

Default implementation delegates to printString. Subclasses such as String and Symbol override this to return a more readable form without developer annotations (e.g. no surrounding quotes or # prefix).

Examples

42 displayString             // => "42"

Inspect the receiver.

Examples

42 inspect             // => "42"

Return the receiver itself. Useful for cascading side effects.

Examples

42 yourself            // => 42

Return a hash value for the receiver.

Examples

42 hash

Test if the receiver responds to the given selector.

Examples

42 respondsTo: #abs    // => true

Return the names of fields.

Examples

42 fieldNames             // => #()

Return the value of the named field.

Examples

object fieldAt: #name

Set the value of the named field (returns new state).

Examples

object fieldAt: #name put: "Alice"

Send a unary message dynamically.

Examples

42 perform: #abs       // => 42

Send a message dynamically with arguments.

Examples

3 perform: #max: withArguments: #(5)   // => 5

Raise an error indicating this method must be overridden by a subclass.

Examples

self subclassResponsibility

Raise an error indicating this method has not yet been implemented.

Use this for work-in-progress stubs. Distinct from subclassResponsibility, which signals an interface contract violation.

Examples

self notImplemented

Send aValue to the current transcript without a trailing newline.

Nil-safe: does nothing when no transcript is set (batch compile, tests).

Examples

42 show: "value: "

Send aValue to the current transcript followed by a newline.

Nil-safe: does nothing when no transcript is set (batch compile, tests).

Examples

42 showCr: "hello world"

Test if the receiver is an instance of aClass or any of its subclasses.

Examples

42 isKindOf: Integer    // => true
42 isKindOf: Object     // => true
#foo isKindOf: Symbol   // => true
#foo isKindOf: String   // => false

Raise an error with the given message.

Examples

self error: "something went wrong"

Test value equality (Erlang ==).

Examples

42 == 42           // => true
"abc" == "abc"     // => true

Test value inequality (negation of ==).

Examples

1 /= 2             // => true
42 /= 42           // => false

Return the class of the receiver.

Examples

42 class            // => Integer
"hello" class       // => String

Handle messages the receiver does not understand. Override for custom dispatch.

Examples

42 unknownMessage   // => ERROR: does_not_understand

Send a message dynamically with an arguments list.

Examples

42 perform: #abs withArguments: #()   // => 42

Execute a class method in the caller's process, bypassing gen_server dispatch.

The caller takes responsibility for knowing the method does not mutate class state. Useful for long-running class methods that would otherwise block the class object's gen_server.

Limitations: only resolves methods defined directly on the target class module (does not walk the superclass chain). Class variables and self are not available to the method (nil and #{} are passed).

Examples

MyClass performLocally: #run:ctx: withArguments: #(input, ctx)

Send a message dynamically with an arguments list and explicit timeout.

The timeout (in milliseconds or #infinity) applies to the gen_server:call when the receiver is an actor. For value types, timeout is ignored.

Examples

actor perform: #query withArguments: #(sql) timeout: 30000