Datasets and Parameters › Process Parameters › Calculated Parameters › JavaScript Operators › Array and Object Access Operators

Array and Object Access Operators

JavaScript uses dot (.) notation for arrays and object access. You can access elements of an array using square bracket notation ([ ]) and elements of an object using dot (.) notation. JavaScript treats dot and square bracket notation as operators.

Dot notation uses the following format:

object.identifier

The identifier operand can be the literal name of the property, method, or variable name (in a dataset), without single or double quotation marks. The operand cannot be a string or variable that contains a string.

Square bracket notation uses the following formats:

array[expression] // 

The array operand refers to an array, and the [expression] operand evaluates to an integer value for an array index.

object[expression] // 

The object operand refers to an object, and the [expression] operand evaluates to a string that names a property of the object.

Note: Unlike dot notation, where the second operand is an identifier, the [expression] operand is a string.

Square bracket notation allows access to array elements and object properties. Square bracket notation also allows access to object properties without restricting the identifier operand as dot notation does.