Px - japgolly.scalajs.react.extra.Px

A mechanism for caching data with dependencies.

This is basically a performance-focused, lightweight implementation of pull-based FRP, pull-based meaning that in the chain A→B→C, an update to A doesn't affect C until the value of C is requested.

What does Px mean? I don't know, I just needed a name and I liked the way @lihaoyi's Rx type name looked in code. You can consider this "Performance eXtension". If this were Java it'd be named AutoRefreshOnRequestDependentCachedVariable.

Linear Supertypes

AnyRef, Any

Known Subclasses

Derivative, DerivativeBase, FlatMap, Map, Root, ThunkM, Var

Abstract Value Members

abstract def peek: A

Get the last used value without updating.
abstract def rev: Int

Revision of its value.
Revision of its value. Increments when value changes.
abstract def value(): A

Get the latest value, updating itself if necessary.

Concrete Value Members

final def !=(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def ##(): Int

Definition Classes
AnyRef → Any
final def ==(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def asInstanceOf[T0]: T0

Definition Classes
Any
def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def equals(arg0: Any): Boolean

Definition Classes
AnyRef → Any
macro def extract: A

If this Px contains a function, it can be extracted and the Px dropped from the signature.
If this Px contains a function, it can be extracted and the Px dropped from the signature. Every time the function is invoked it will use the latest value of this Px, even if you don't explicitly hold a reference to it anymore.
Example. From a Px[Int => String], an Int => String can be extracted.
def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )
def flatMap[B](f: (A) ⇒ Px[B]): Derivative[B]
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
def hashCode(): Int

Definition Classes
AnyRef → Any
final def isInstanceOf[T0]: Boolean

Definition Classes
Any
def map[B](f: (A) ⇒ B): Derivative[B]
final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final def notify(): Unit

Definition Classes
AnyRef
final def notifyAll(): Unit

Definition Classes
AnyRef
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
final def toCallback: CallbackTo[A]
def toString(): String

Definition Classes
AnyRef → Any
final def valueSince(r: Int): Option[A]
final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )

Px

Related Docs: object Px | package extra

sealed abstract class Px[A] extends AnyRef

Abstract Value Members

abstract def peek: A

abstract def rev: Int

abstract def value(): A

Concrete Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: Any): Boolean

final def asInstanceOf[T0]: T0

def clone(): AnyRef

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

macro def extract: A

def finalize(): Unit

def flatMap[B](f: (A) ⇒ Px[B]): Derivative[B]

final def getClass(): Class[_]

def hashCode(): Int

final def isInstanceOf[T0]: Boolean

def map[B](f: (A) ⇒ B): Derivative[B]

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

final def synchronized[T0](arg0: ⇒ T0): T0

final def toCallback: CallbackTo[A]

def toString(): String

final def valueSince(r: Int): Option[A]

final def wait(): Unit

final def wait(arg0: Long, arg1: Int): Unit

final def wait(arg0: Long): Unit

Inherited from AnyRef

Inherited from Any

Ungrouped