_{Official ZPE/YASS documentation}Expression query

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Overview

ZPEExpressionQuery is the lazy result type produced by a ZEQL expression. It cannot be constructed directly with new.

Reference methods

to_list() ⇒ list: Enumerates the query into a new mutable list.
length() ⇒ number: Enumerates and counts the values without retaining a second result list.
first() ⇒ mixed: Returns the first result, or undefined if the query is empty.
to_string() ⇒ string: Enumerates the query and returns its list representation as a string.

Example

YASS

$adults = from $person in $people
  where $person->age >= 18
  select $person->name

print($adults->first())

Its implementation was made available in ZPE 1.14.9 (Spurriergate, September 2026).

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