kaw2k

export type Tree<T> = Leaf<T> | TreeNodeArray<T> | TreeNodeObject<T>;

type GenericObject<T> = { [key: string]: T };

type ChildrenArray<T> = Tree<T>[];
type ChildrenObject<T> = GenericObject<Tree<T>>

function mapObj<T, U>(fn: ((value: T, key: string) => U), obj: GenericObject<T>): GenericObject<U> {
    let ret = {};

kaw2k

const { find, identity, toPairs, compose, map, curry } = require('ramda');

/* tslint:disable: no-any */
type AnyType = any;
/* tslint:enable: no-any */

type TComparator = (a: AnyType, b: AnyType) => number;

type TObjectComparator = {
    [key: string]: TComparator;

kaw2k

function map(transformation, data) {
    return data.map(transformation);
}

map(addOne, [1, 2, 3]);
map(addOne, listNode(1, listNode(2, listNode(3))));
map(addOne, treeNode(1, treeNode(2), treeNode(3)));

kaw2k

function addOneAndMultiplyTwo(x) { return multiplyTwo(addOne(x)); }

[1, 2, 3].map(addOneAndMultiplyTwo);
listNode(1, listNode(2, listNode(3))).map(addOneAndMultiplyTwo);
treeNode(1, treeNode(2), treeNode(3)).map(addOneAndMultiplyTwo);

kaw2k

[1, 2, 3].map(identity); 
// [1, 2, 3]

listNode(1, listNode(2, listNode(3))).map(identity);
// listNode(1, listNode(2, listNode(3)))

treeNode(1, treeNode(2), treeNode(3)).map(identity);
// treeNode(1, treeNode(2), treeNode(3))

kaw2k

function identity(x) { return x; }

kaw2k

var tree = treeNode(1, treeNode(2), treeNode(3));
tree.map(function(x) {
    return x + 1;
});
// treeNode(2, treeNode(3), treeNode(4))

kaw2k

function treeNode(value, left, right) {
    return {
        value: value,
        left: left,
        right: right,
        map: function(transformation) {
            var nextValue = transformation(nextValue);

            var nextLeft;
            if (left) nextLeft = left.map(transformation);

kaw2k

function treeNode(value, left, right) {
    return {
        value: value,
        left: left,
        right: right
    };
}

var myTree = treeNode(1, treeNode(2), treeNode(3)); 

kaw2k

var linkedList = listNode(1, listNode(2, listNode( 3)));

linkedList.map(function(x) {
    return x + 1;
});
// listNode(2, listNode(3, listNode( 4)));