module.exports = shift function shift (stream) { var rs = stream._readableState if (!rs) return null return rs.objectMode ? stream.read() : stream.read(getStateLength(rs)) } function getStateLength (state) { if (state.buffer.length) { // Since node 6.3.0 state.buffer is a BufferList not an array if (state.buffer.head) { return state.buffer.head.data.length } return state.buffer[0].length } return state.length }