/**
* Get the files not selected.
*
* @return {Stream}
*/
rest() {
const restStream = new Stream(null, null);
restStream.on('end', leaf => {
this._streams.push(leaf);
});
return restStream;
}
/**
* Select some files matched the pattern.
*
* @param {string} pattern
* @return {Stream}
*/
pick(pattern) {
if (!pattern || !isString(pattern)) {
throw new Error(`A string pattern is required to pick up some files`);
}
const stream = new Stream(null, pattern);
stream.on('end', leaf => {
this._streams.push(leaf);
});
return stream;
}