mongo.bson.iterator.type: Get the type of data pointed to by an iterator

In jonkatz2/rmongodb: R-MongoDB driver

Description

Return the type of the field currently pointed to by a mongo.bson.iterator.

Usage

mongo.bson.iterator.type(iter)

Arguments

iter	A mongo.bson.iterator.

Value

(integer) The type of the field pointed to by the iterator as indicated by the following constants:

• mongo.bson.eoo – End of Object (0L)

• mongo.bson.double

• mongo.bson.string

• mongo.bson.object

• mongo.bson.array

• mongo.bson.binary

• mongo.bson.undefined

• mongo.bson.oid

• mongo.bson.bool

• mongo.bson.date

• mongo.bson.null

• mongo.bson.regex

• mongo.bson.dbref – deprecated (follow link for more info)

• mongo.bson.code

• mongo.bson.symbol

• mongo.bson.code.w.scope

• mongo.bson.int

• mongo.bson.timestamp

• mongo.bson.long

See Also

mongo.bson.iterator,
mongo.bson.iterator.create,
mongo.bson.find,
mongo.bson.iterator.next,
mongo.bson.iterator.key,
mongo.bson.iterator.value,
mongo.bson.

Examples

buf <- mongo.bson.buffer.create()
# Append a string
mongo.bson.buffer.append(buf, "name", "Joe")
# Append a date/time
mongo.bson.buffer.append(buf, "created", Sys.time())
# Append a NULL
mongo.bson.buffer.append(buf, "cars", NULL)
b <- mongo.bson.from.buffer(buf)

iter <- mongo.bson.iterator.create(b)
while (mongo.bson.iterator.next(iter))
    if (mongo.bson.iterator.type(iter) == mongo.bson.date) {
        print(mongo.bson.iterator.value(iter))
        break
    }

# The above is given for illustrative purposes, but may be performed
# much easier by the following:
iter <- mongo.bson.find(b, "created")
print(mongo.bson.iterator.value(iter))

jonkatz2/rmongodb documentation built on May 19, 2019, 7:30 p.m.