| var assert = require('assert'); |
| var traverse = require('traverse'); |
| |
| exports.stop = function () { |
| var visits = 0; |
| traverse('abcdefghij'.split('')).forEach(function (node) { |
| if (typeof node === 'string') { |
| visits ++; |
| if (node === 'e') this.stop() |
| } |
| }); |
| |
| assert.equal(visits, 5); |
| }; |
| |
| exports.stopMap = function () { |
| var s = traverse('abcdefghij'.split('')).map(function (node) { |
| if (typeof node === 'string') { |
| if (node === 'e') this.stop() |
| return node.toUpperCase(); |
| } |
| }).join(''); |
| |
| assert.equal(s, 'ABCDEfghij'); |
| }; |
| |
| exports.stopReduce = function () { |
| var obj = { |
| a : [ 4, 5 ], |
| b : [ 6, [ 7, 8, 9 ] ] |
| }; |
| var xs = traverse(obj).reduce(function (acc, node) { |
| if (this.isLeaf) { |
| if (node === 7) this.stop(); |
| else acc.push(node) |
| } |
| return acc; |
| }, []); |
| |
| assert.deepEqual(xs, [ 4, 5, 6 ]); |
| }; |