stop.js•990 B
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 ]);
};