Adds an observer to the subscribers of the station

* Add a node at the head of the list @list and increment the number of nodes in the list (member `size`) * * @l: linked list * @value: value to add to

Sends a message to APPROPRIATE subscribers.

* Function used to compare two structures based on their averages. * * @s1 : a pointer to the first structure * @s2 : a pointer to the second structur

Should compare Tree by using name and age in that specific order returns: > 0 if this is greater then o 0 if they are equal < 0 if this is less than o

Should compare Flower by using name and age in that specific order returns: > 0 if this is greater then o 0 if they are equal < 0 if th

Should compare Plant by using name and age in that specific order returns: > 0 if this is greater than o 0 if they are equal < 0 if thi

* Return 1 if there is a node containing @value in @tree and 0 otherwise. */

* @pre file_name != NULL, name of the original file * new_file_name != NULL, name of the new file (the copy) * * @post copy the contents of {f

* Function used to launch threads that will do the work for us. * * @long_computing : a function that will do a really long computing and that must be

Returns a new list containing only the elements from this list that fullfill predicate f (i.e. f(elem) == true)

Returns a new list containing only the elements from this list that fullfill predicate f (i.e. f(elem) == true)