Redis Commands
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Inserts element in the list stored at key either before or after the reference value pivot.

When key does not exist, it is considered an empty list and no operation is performed.

An error is returned when key exists but does not hold a list value.

@return

@integer-reply: the list length after a successful insert operation, 0 if the key doesn't exist, and -1 when the pivot wasn't found.

@examples

RPUSH mylist "Hello"
RPUSH mylist "World"
LINSERT mylist BEFORE "World" "There"
LRANGE mylist 0 -1

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