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is_valid_index

Sequence.is_valid_index

(I 
type
:
integer, i I)
 => 
bool
check if argument is a valid index in this sequence.

Note that this may have a performance in O(i) unless this
Sequence is_array_backed.

Type Parameters

0.099dev (GIT hash a1331a3dc7ff37424401d3c7d0dba5be1302516f)
last changed: 2026-07-23