Lesson 23 of 55
9 mins readThe splice() Swiss Army Knife
In Plain English
`splice(@array, $offset, $length, @replacements)` is Perl all-in-one array mutation tool, capable of inserting, deleting, or replacing elements at any position.
Deep Dive: How It Works
Syntax: `splice(@arr, $offset, $length, @new_items)`.
Remove Elements: `splice(@arr, 2, 1)` deletes 1 element at index 2.
Insert Without Deletion: `splice(@arr, 1, 0, "inserted")` inserts at index 1.
Return Value: Returns the removed elements as a list.
Core Rules to Remember
Universal Array Editor: Can replicate `pop`, `shift`, `push`, `unshift`, and middle insertions.
In-Place Mutation: Directly modifies the target array.
Live Interactive Example
Hit Run Code to see it liveSplicing Array Elements
Python 3.12
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Output Console
Click "Run Code" to view the rendered output.
How it works: splice removed 30 and inserted 99, 100 in its place.
Your Turn: Micro Challenge
No pressure! Edit the starter code below and test your solution with instant feedback.
Micro Exercise
Insert Element with splice
- Declare `my @items = ("A", "C");`
- Use `splice(@items, 1, 0, "B");` to insert "B" at index 1.
- Print `"Items: " . join("-", @items) . "\n"`.
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Sandbox Output
Click "Run & Check" to test your solution.
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