 Package

org.taffy.core.container
 Object Hierarchy
 What is it?

A Pair is a container that contains two objects: left and right.
 Quick Example
pair = [Pair left: 1 right: 100]
Table of Contents:
Constructing a Pair
A Pair is created by either the Pair#left:right: method, or by the new keyword and setLeft: and setRight:.
// create a pair via the Pair#left:right: method pair = [Pair left: 1 right: 20] ==> #Pair<1, 20> // create a pair, and set its values later // by default, left and right are nil pair = new Pair ==> #Pair<nil, nil> pair setLeft: "1" ==> #Pair<"1", nil> pair setRight: "2" ==> #Pair<"1", "2">
The left and right values are arbitrary.
Setting and Getting
As seen above, the setLeft: and setRight: methods set values in a pair. Use left and right to get values:
pair = [Pair left: 'cow right: 'jumps] pair left ==> 'cow pair right ==> 'jumps
Iterating
The elements of an array can be iterated by using the each: method:
pair = [Pair left: 1 right: 2] pair each: { <value> io putLine: value } ==> 1 ==> 2
Arithmetic
Since Pair inherits from LineContainer, it supports mean, min, max, range, variance and standardDeviation.
pair = [Pair left: 1 right: 2] pair min ==> 1 pair max ==> 2 pair mean ==> 1.5 pair range ==> 1 pair variance ==> 0.25 pair standardDeviation ==> 0.5