ft_list_foreach — Apply Function to List

Allowed functions: none

Write a function that takes a list and a function pointer, and applies this function to each element of the list.

void    ft_list_foreach(t_list *begin_list, void (*f)(void *));

The function pointed to by f will be used as follows:

(*f)(list_ptr->data);

Solution

Download ft_list_foreach.c

#include "ft_list.h"

void ft_list_foreach(t_list *begin_list, void (*f)(void *)) {

	while (begin_list) {
		(*f)(begin_list->data);
		begin_list = begin_list->next;
	}
}

How It Works

Goal: Apply a given function to the data of every element in a linked list.

Approach: Traverse the list node by node, calling the function pointer on each node's data.

Step by step:

1. Loop while begin_list is not NULL.
2. Call (*f)(begin_list->data) to apply the function to the current node's data.
3. Advance to the next node with begin_list = begin_list->next.

Key concept: Function pointers — passing a function as a parameter and invoking it with (*f)(arg) syntax.