traverse: function (obj, query, breakOnFirst) {
var queries, queryEngine,
results, qLen, q, f;
this.reset();
obj = obj || this.subject;
results = this.results;
query = utils.isArray(query) ? query.toString() : query;
if (typeof query === 'string') {
queries = [[Query.parse(query, this.options), false]];
}
else {
queries = utils.keys(query).
map(function (src) {
return [queryEngine.parse(src), query[src]];
});
}
qLen = queries.length;
this.traverser.
on('leave', function (path, traverser) {
var i = 0,
node;
for (; i < qLen; i++) {
node = path.node;
q = queries[i];
if (q[0].test(path)) {
results.push(node);
f = q[1];
if (f) {
path.ffwd();
f(path);
}
if (breakOnFirst) {
traverser.break();
break;
}
}
}
}).
walk(obj);
return this;
},
map(function (key) {
var from, to, by;
switch (typeof key) {
case 'string':
case 'number':
return key;
case 'object':
if (!utils.isArray(key)) {
from = key.from || 0;
to = key.to + 1;
by = key.by || 1;
key = utils.range(from, to, by);
}
return key;
}
}).