Function mapper

lib/index-browser.js:9194–9204

(mapFun, emit)

}

function mapper(mapFun, emit) {
  // for temp_views one can use emit(doc, emit), see #38
  if (typeof mapFun === "function" && mapFun.length === 2) {
    var origMap = mapFun;
    return function (doc) {
      return origMap(doc, emit);
    };
  } else {
    return evalFunctionWithEval(mapFun.toString(), emit);
  }
}

function reducer(reduceFun) {
  var reduceFunString = reduceFun.toString();