Sha256: 27b179eacbba368022a640e789706ab9e5c2dcb078d4ca216ee09b5f9aa82fad
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Size: 402 Bytes
Versions: 6
Compression:
Stored size: 402 Bytes
Contents
# Sum
Arithmetic sum
## Signature
sum(expr: AttrName|(Tuple->Numeric)) -> Aggregator
## Examples
sum(:qty)
sum{|t| t.qty * t.price }
sum(->(t){ t.qty * t.price })
## Description
Computes `v1 + v2 + ... + vn`.
## Implementation notes
This aggregate function should only be used with numeric types. As of
current Alf version, it does not aggregate empty sets correctly on
non-numeric data types.
Version data entries
6 entries across 6 versions & 1 rubygems