A collection — sometimes called a container — is simply an object that groups multiple elements into a single unit. Collections are used to store, retrieve, manipulate, and communicate aggregate data. Typically, they represent data items that form a natural group, such as a poker hand (a collection of cards), a mail folder (a collection of letters), or a telephone directory (a mapping of names to phone numbers). If you have used the Java programming language — or just about any other programming language — you are already familiar with collections.
Collection methods in Pseudocodean informal high-level description of the operating principle of a computer program or other algorithm. are:
- .addItem( new data item )
- .resetNext( ) start at beginning of listGive a sequence of brief answers with no explanation.
- .hasNext( ) checks whether there are still more items in the listGive a sequence of brief answers with no explanation.
- .getNext( ) retrieve the next item in the listGive a sequence of brief answers with no explanation.
- .isEmpty( ) check whether the listGive a sequence of brief answers with no explanation. is empty
Write, in pseudocode, a collection that adds the first names of everyone in the class. You then must find the name of everyone whose name starts with M.
Do you understand this?
- DescribeGive a detailed account or picture of a situation, event, pattern or process. the characteristics and applications of a collection.
- ConstructDevelop information in a diagrammatic or logical form. algorithms using the access methods of a collection.
- DiscussOffer a considered and balanced review that includes a range of arguments, factors or hypotheses. Opinions or conclusions should be presented clearly and supported by appropriate evidence. the need for sub-programmes and collections within programmed solutions.
- ConstructDevelop information in a diagrammatic or logical form. algorithms using pre-defined sub-programmes, one-dimensional arrays and/or collections.