Code.org Unit 6 - Lists

An ordered collection of elements.

• Sequence

• List

• Length

• Element

 An individual value in a list that is assigned a unique index.

• Sequence

• List

• Length

• Element

A common method for referencing the elements in a list or string using numbers.

• Sequence

• List

• Index

• Element

Refers to the entire length of a list.

• [list].length

• [list].length-1

A way to reference the last item in a list.

• [list].length

• [list].length-1

Allows a user to see random elements in a list that generate a random number between 0 and the length of the list minus one.

• Random List Access Pattern

• Scrolling List Pattern

• List Length

• appendItem

Allows a user to "scroll" through all the items in the list.

• Random List Access Pattern

• Scrolling List Pattern

• List Length

• appendItem

Removes the element in the given list at the given index.

• removeItem(list, index)

• appendItem(list, item)

• insertItem(list, index, item)

• list.length-1

Adds an element to the end of the list.

• removeItem(list, index)

• appendItem(list, item)

• insertItem(list, index, item)

• list.length-1

Inserts an element into a list at the index given.

• removeItem(list, index)

• appendItem(list, item)

• insertItem(list, index, item)

• list.length-1