typeOf

typeOf

> Functions

Returns the type of the value value, among the following types:

• TYPE_NULL for a null value.
• TYPE_BOOLEAN for a boolean, true or false.
• TYPE_NUMBER for a number, for example: 12, -0.15, 10L.
• TYPE_STRING for a string, for example: "hello".
• TYPE_ARRAY for an array, for example: [1, 2, 3].
• TYPE_MAP for an associative array, for example: [a: 5, b: true].
• TYPE_OBJECT for an object, for example: {a: 5, b: true}.
• TYPE_CLASS for a class, for example: class A { }.
• TYPE_FUNCTION for a function, for example: function() {}.
• TYPE_SET for a set, for example: ``.
• TYPE_INTERVAL for an interval, for example: [0..9].

Parameters

• value: The value whose type will be returned.

Return

• type: (number) The type of value.

TypeScript

In JavaScript, typeof value returns a string — "number", "string", "boolean", "function", "object", "undefined" — and not a numeric constant like typeOf in LeekScript. Two classic pitfalls: typeof [] and typeof null are both "object". Use Array.isArray(value) to recognize an array, value === null for null, and instanceof for the rest: value instanceof Map, value instanceof Cell, value instanceof Entity.

Python

In Python, type(value) returns the class of the value and not a numeric constant like typeOf in LeekScript: type([]) is `, and type(value).__name__ gives "list", "bool", "Cell"… To test a type, always write isinstance(value, list) rather than type(value) is list: the engine wraps list, dict, set, tuple and frozenset to count operations, so type([]) is list is False while isinstance([], list) is True. As a bonus, isinstance accepts a tuple of types, isinstance(x, (int, float))`, and recognizes subclasses.