Function tryMap

lib/index.js:8184–8192

(db, fun, doc)

function createAbstractMapReduce(localDocName, mapper, reducer, ddocValidator) {

  function tryMap(db, fun, doc) {
    // emit an event if there was an error thrown by a map function.
    // putting try/catches in a single function also avoids deoptimizations.
    try {
      fun(doc);
    } catch (e) {
      emitError(db, e, {fun, doc});
    }
  }

  function tryReduce(db, fun, keys, values, rereduce) {
    // same as above, but returning the result or an error. there are two separate