Array

An array is a numerically indexed collection of elements holding values.

Related concepts:  TypeValue

Closest Wikipedia entry:  Array data type — In computer science, array is a data type that represents a collection of elements (values or variables), each selected by one or more indices (identifying keys) that can be computed at run time during program execution. Such a collection is usually called an array variable or array value. By analogy with the mathematical concepts vector and matrix, array types with one and two indices are often called vector type and matrix type, respectively.

Misconceptions about Array

23 documented Misconceptions

ArrayAccessWithParentheses — Java

Parenthesis are used to access an element in an array

ArrayAllocationWithoutNew — Java

Arrays are created without the new keyword

ArrayBracketCountIsLength — Java

The number of brackets in an array type or an array initializer corresponds to the length of the array

ArrayElementTypeRepeats — Java

The type of a multi-dimensional array is written as T[] T[] T[]

ArrayElementsUntyped — Java

Elements of arrays are untyped

ArrayHasLengthMethod — Java

To get the length of an array, one needs to call its length method

ArrayInitializerContentsInBrackets — Java

Array initializers list the elements in square brackets

ArrayLengthCannotBeZero — Java

An array cannot have a length of 0 elements

ArrayLengthPartOfType — Java

The length of an array is part of its type

ArrayListIsArray — Java

ArrayLists are arrays

ArrayRankIsLength — Java

Array rank and array length are the same thing

ArrayRankNotPartOfType — Java

The rank of an array is not part of its type

ArraysGrow — Java

Arrays can grow dynamically

ForEachIteratesOverIndices — Java

An enhanced for loop iterates over the indices of an array or a collection

ForEachVariableIsElement — Java

One can assign to the variable of an enhanced for statement to store a value in the corresponding array or collection element

ListLengthCannotBeZero — Scratch

A list cannot have a length of 0 items

ListsHomogeneous — Scratch

All items in a list must have the same type

MapInPlace — JavaScript

Map modifies the elements of the array on which it operates in place

MultidimensionalArray — Java

A multi-dimensional array is one thing

NoJaggedArrays — Java

Multi-dimensional arrays have a rectangular shape

OnlyInnermostArrayElements — Java

Only the elements of the innermost array of a multi-dimensional array are accessible

OutOfBoundsElementsAreNull — Java

Out-of-bounds array elements are null

TypeofArrayIsArray — JavaScript

The typeof operator applied on an array returns 'array'