Challenge: Task Management System
Imagine you have a simple task management system using a list in Redis. Your task is to perform the following actions:
-
Create a task list (named
todo_list) and add the following tasks to it:"Do a workout","Read a book","Call a friend"; -
Retrieve and display the entire task list. After this step, the list should contain three tasks;
-
Remove the last task from the list and display the updated list. After this step, the list should contain only two tasks;
-
Update the first task to
"Cook lunch"and display the updated list. After this step, the list should reflect the change; -
Retrieve the text of the second task directly (by index). Redis should return the task's text.
Creating a task list and adding tasks:
Retrieving the entire task list:
Removing the last task and displaying the list:
The RPOP command removes the last item in the list "Do a workout".
Then, use LRANGE again to check the updated list:
Updating the first task and displaying the list:
The LSET command updates the item at the specified index. Here, "Cook lunch" replaces "Call a friend" (index 0).
Use LRANGE again to verify the update:
Retrieving the second task directly by index:
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Can you explain what each Redis command does in this example?
What would the task list look like after each step?
How can I add or remove tasks at specific positions in the list?
Awesome!
Completion rate improved to 3.33Challenge: Task Management System
Pyyhkäise näyttääksesi valikon
Imagine you have a simple task management system using a list in Redis. Your task is to perform the following actions:
-
Create a task list (named
todo_list) and add the following tasks to it:"Do a workout","Read a book","Call a friend"; -
Retrieve and display the entire task list. After this step, the list should contain three tasks;
-
Remove the last task from the list and display the updated list. After this step, the list should contain only two tasks;
-
Update the first task to
"Cook lunch"and display the updated list. After this step, the list should reflect the change; -
Retrieve the text of the second task directly (by index). Redis should return the task's text.
Creating a task list and adding tasks:
Retrieving the entire task list:
Removing the last task and displaying the list:
The RPOP command removes the last item in the list "Do a workout".
Then, use LRANGE again to check the updated list:
Updating the first task and displaying the list:
The LSET command updates the item at the specified index. Here, "Cook lunch" replaces "Call a friend" (index 0).
Use LRANGE again to verify the update:
Retrieving the second task directly by index:
Kiitos palautteestasi!
