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