sequence.offsetsOf(datum | predicate_function) → array
Get the indexes of an element in a sequence. If the argument is a predicate, get the indexes of all elements matching it.
Example: Find the position of the letter ‘c’.
r.expr(r.array("a", "b", "c")).offsetsOf("c").run(conn);
Example: Find the popularity ranking of invisible heroes.
r.table("marvel").union(r.table("dc")).orderBy("popularity").offsetsOf(
row -> row.g("superpowers").contains("invisibility")
).run(conn);
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