22 lines
563 B
Markdown
22 lines
563 B
Markdown
---
|
|
title: Initialize 2D list
|
|
tags: list
|
|
expertise: intermediate
|
|
firstSeen: 2019-10-25T10:11:51+03:00
|
|
lastUpdated: 2020-11-02T19:28:05+02:00
|
|
---
|
|
|
|
Initializes a 2D list of given width and height and value.
|
|
|
|
- Use a list comprehension and `range()` to generate `h` rows where each is a list with length `h`, initialized with `val`.
|
|
- Omit the last argument, `val`, to set the default value to `None`.
|
|
|
|
```py
|
|
def initialize_2d_list(w, h, val = None):
|
|
return [[val for x in range(w)] for y in range(h)]
|
|
```
|
|
|
|
```py
|
|
initialize_2d_list(2, 2, 0) # [[0, 0], [0, 0]]
|
|
```
|