text: module.exports = function LastIndex (s, sep) {
    //  discuss at: http://locutus.io/golang/strings/LastIndex
    // original by: Kevin van Zonneveld (http://kvz.io)
    //    input by: GopherJS (http://www.gopherjs.org/)
    //   example 1: LastIndex('go gopher', 'go')
    //   returns 1: 3
    //   example 2: LastIndex('go gopher', 'rodent')
    //   returns 2: -1
  
    return parseInt(s.lastIndexOf(sep), 10) >> 0
  }
  