All Articles - Page 17 of 33

Redis Command: LLEN

July 8, 2024November 6, 2023 by BigBoxCode

Get the length of a list. We get zero as a result for a non-existing list and an exception is thrown for a wrong data type.

Redis Command: LINDEX

July 8, 2024November 5, 2023 by BigBoxCode

Get an element from a list at a specific index. Time complexity of this command is O(N). Here N is the number of items that we have to go through to get the specified index. In the case of positive indexing, the counting starts from the HEAD/Left. In the case of negative indexing, the counting starts from the TAIL/Right end.

Redis Command: LMOVE

July 8, 2024November 3, 2023 by BigBoxCode

Pop an item from one list and push it to another list. We have full control of the source and destination, and on which end of both lists we want to perform the operation. As the command RPOPLPUSH is deprecated, this LMOVE command can be used as a substitute for that.

Redis Command: LRANGE

July 8, 2024October 31, 2023 by BigBoxCode

Retrieve items from a list. This command gets the items of a list by start and end indexes. This is the most used command for checking and fetching items from a list. To retrieve all the items from the list use start_index=0 and stop_index=-1. Like- LRANGE mysimplelist 0 -1

Redis Command: LPUSH

July 8, 2024October 29, 2023 by BigBoxCode

Prepend one or more elements to the list. The element is added to the head/left of the list, this command is named LPUSH(L+PUSH). If LPUSH command is used and a list does not exist for the key, then a list is created first and LPUSH is applied after that.

Redis Command: STRLEN

July 8, 2024October 26, 2023 by BigBoxCode

Get the length of the saved string value of the . If the type of the value in the provided key is not a string then it reruns error.

Redis Command: GETRANGE

July 8, 2024October 24, 2023 by BigBoxCode

Get substring from a string value. The substring is obtained from the specified and the offsets are defined by the and . Counting of the index starts from Zero(0). Both the start and end index are inclusive.

Redis Command: DECR

July 8, 2024October 20, 2023 by BigBoxCode

Decrease the value stored in by One(1). If the key does not exist then this command will set the key and the value will be Zero(0), before performing the operation. And after the operation is performed, the value will be negative one(-1). If the value is not an integer, like a string that can not be covered to an integer, or a list, set, etc. then this command will return an error.

Redis Command: INCR

July 8, 2024October 17, 2023 by BigBoxCode

Increase the value stored in by One(1). Used when we want to increase some count by one. For example, we want to save- Total number of logged-in users, Number of times the user tries to log in or reset the password, Number of times the user tries to access some resource or API endpoint.

Redis Command: APPEND

July 8, 2024October 16, 2023 by BigBoxCode

Append the provided string to the existing string value of a . If the key does not exist then this command creates the key first with an empty value, then appends the provided value to that empty string. In case the does not exist then the APPEND command behaves like the SET command.