mmatch-methods: Add a $match stage to a MongoPipeline.
In returnString/mongoplyr: MongoDB Aggregation Pipeline for R

Add a $match stage to a MongoPipeline.

mmatch(p, expr)

## S4 method for signature 'MongoPipeline'
mmatch(p, expr)

`p`	A MongoPipeline instance.
`expr`	An expression indicating the requirements to match against.

A copy of the previous pipeline, with the new stage added.

returnString/mongoplyr documentation built on May 17, 2019, 2:22 p.m.

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