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Contents
# Concat
String concatenation
## Signature
concat(expr: AttrName|(Tuple->Numeric)) -> Aggregator
## Examples
concat(:name)
concat(:name, between: ', ')
concat(between: ', '){|t| t.name }
concat(->(t){ t.name.upcase }, between: ', ')
## Description
Concatenates string representations of input values.
## Implementation notes
This aggregate function can be applied to any data type, not only String
attributes. Ruby's `to_s` will be used on values prior to concatenation.
The options are:
* `before` starts the resulting string (defaults to '')
* `after` ends the resulting string (defaults to '')
* `between` is used between each value
As of current Alf version, the order in which the values are concatenated
is not guaranteed. So far, this function is thus non-deterministic.
Version data entries
6 entries across 6 versions & 1 rubygems