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  2. List (abstract data type) - Wikipedia

    en.wikipedia.org/wiki/List_(abstract_data_type)

    A list may contain the same value more than once, and each occurrence is considered a distinct item. A singly-linked list structure, implementing a list with three integer elements. The term list is also used for several concrete data structures that can be used to implement abstract lists, especially linked lists and arrays.

  3. List of Java keywords - Wikipedia

    en.wikipedia.org/wiki/List_of_Java_keywords

    The byte keyword is used to declare a field that can hold an 8-bit signed two's complement integer. [5] [6] This keyword is also used to declare that a method returns a value of the primitive type byte. [7] [8] case A statement in the switch block can be labeled with one or more case or default labels.

  4. Fold (higher-order function) - Wikipedia

    en.wikipedia.org/wiki/Fold_(higher-order_function)

    In practice, it is convenient and natural to have an initial value which in the case of a right fold is used when one reaches the end of the list, and in the case of a left fold is what is initially combined with the first element of the list. In the example above, the value 0 (the additive identity) would be chosen as an initial value, giving ...

  5. Switch statement - Wikipedia

    en.wikipedia.org/wiki/Switch_statement

    A lookup table, which contains, as keys, the case values and, as values, the part under the case statement. (In some languages, only actual data types are allowed as values in the lookup table. In other languages, it is also possible to assign functions as lookup table values, gaining the same flexibility as a real switch statement.

  6. clone (Java method) - Wikipedia

    en.wikipedia.org/wiki/Clone_(Java_method)

    Where the value of the field is an immutable object this is okay; just let the 'constructor' copy the reference and both the original and its clone will share the same object. But where the value is a mutable object it must be deep copied. One solution is to remove the final modifier from the field, giving up the benefits the modifier conferred.

  7. For loop - Wikipedia

    en.wikipedia.org/wiki/For_loop

    The loop body is executed "for" the given values of the loop variable. This is more explicit in ALGOL versions of the for statement where a list of possible values and increments can be specified. In Fortran and PL/I, the keyword DO is used for the same thing and it is named a do-loop; this is different from a do while loop.

  8. List comprehension - Wikipedia

    en.wikipedia.org/wiki/List_comprehension

    Here, the list [0..] represents , x^2>3 represents the predicate, and 2*x represents the output expression.. List comprehensions give results in a defined order (unlike the members of sets); and list comprehensions may generate the members of a list in order, rather than produce the entirety of the list thus allowing, for example, the previous Haskell definition of the members of an infinite list.

  9. Java collections framework - Wikipedia

    en.wikipedia.org/wiki/Java_collections_framework

    Queues allow the programmer to insert items in a certain order and retrieve those items in the same order. An example is a waiting list. The base interfaces for queues are called Queue. Dictionaries/Maps store references to objects with a lookup key to access the object's values. One example of a key is an identification card.