Creates an empty list.

Creates an empty SLList.

Creates an empty list.

Creates an empty list.

Creates an empty list.

Creates an empty SLList.

Inserts an item at the front.

Adds x to the front of the list.

Inserts an item at the front.

Inserts an item at the front.

Puts an item at the back of the list.

Inserts X into the back of the list.

Adds an item to the end of the list.

Inserts X into the back of the list.

Puts an item at the back of the list.

Inserts X into the back of the list.

Puts an item at the back of the list.

Adds x to the end of the list.

Returns ten times the argument.

Returns a lower case version of the string with all characters except letters removed.

Returns a map (a.k.a. dictionary) that tracks the count of all specified target words in words.

Returns the count of the number of unique words in words.

Returns an IntList identical to L, but with each element incremented by x. Not allowed to use the 'new' keyword.

Gets the positionth item of the list.

Gets the ith item in the list (0 is the front).

Gets the positionth item of the list.

Gets the ith item in the list (0 is the front).

Returns the ith value in this list.

Gets the positionth item of the list.

Gets the ith item in the list (0 is the front).

Gets the positionth item of the list.

Gets the ith item in the list (0 is the front).

Gets the ith item in the list (0 is the front).

Gets an item from the front.

Returns the first item in the list.

Returns the first item in the list.

Gets an item from the front.

Gets an item from the front.

Gets an item from the front.

Returns the first item in the list.

Returns last item

Returns the item from the back of the list.

Returns last item

Returns the item from the back of the list.

Returns last item

Returns the item from the back of the list.

Returns last item

Returns the item from the back of the list.

Returns an IntList identical to L, but with each element incremented by x. L is not allowed to change.

Inserts item into given position. Code from discussion #3

Inserts item into given position. Code from discussion #3

Inserts item into given position. Code from discussion #3

Inserts item into given position. Code from discussion #3

Inserts item into given position. Code from discussion #3

Inserts item into given position. Code from discussion #3

Inserts item into given position. Code from discussion #3

Inserts item into given position. Code from discussion #3

Return the size of the list using no recursion!

Return the size of the list using no recursion!

Returns the index of the given key if it exists, -1 otherwise.