Redis Lists: LINDEX

Redis LINDEX Command

Redis LINDEX command is used to get the element at index in the list stored at key. The index is zero-based, so 0 means the first element, 1 the second element and so on. Negative indices can be used to designate elements starting at the tail of the list. Here, -1 means the last element, -2 means the penultimate and so forth.

Here are some common uses and scenarios for the "LINDEX" command:

• Random Access: Retrieve elements from a list at specific positions.
• Data Inspection: Inspect the content of a list by accessing elements at various indices.
• Validation: Verify the presence and value of elements at specific positions in a list.
• Configuration Management: Access configuration values stored in list format by index.
• Session Management: Retrieve session data or user attributes stored in lists based on their position.

Syntax:

redis 127.0.0.1:6379> LINDEX KEY_NAME INDEX_POSITION    

Available since

1.0.0.

Return Value

String reply, the requested element, or nil when the index is out of range.

Return Value Type

String

Example: Redis LINDEX

127.0.0.1:6379> LPUSH mycolor1 white black red blue
(integer) 4
127.0.0.1:6379> LRANGE mycolor1 0 -1
1) "blue"
2) "red"
3) "black"
4) "white"
127.0.0.1:6379> LINDEX mycolor1 0
"blue"
127.0.0.1:6379> LINDEX mycolor1 1
"red"
127.0.0.1:6379> LINDEX mycolor1 -1
"white"
127.0.0.1:6379> LINDEX mycolor1 -2
"black"
127.0.0.1:6379> LINDEX mycolor1 6
(nil)

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