zippa/lib/test/tree_zipper.js

A Generic Zipper Library

'use strict';

Object.defineProperty(exports, "__esModule", {
    value: true
});
exports.TreeZipper = exports.Node = undefined;

var _index = require('../index');

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

var Node = exports.Node = function Node(data) {
    var children = arguments.length <= 1 || arguments[1] === undefined ? [] : arguments[1];

    _classCallCheck(this, Node);

    this.data = data;
    this.children = children;
};

function getChildren(node) {
    return node.children;
}

function makeNode(node, children) {
    return new Node(node.data, children);
}

function isBranch(node) {
    return !!getChildren(node).length;
}

var TreeZipper = exports.TreeZipper = (0, _index.makeZipper)(isBranch, getChildren, makeNode);

exports.default = TreeZipper;