typeOf
typeOf<T>(value: T): Type<T>
Returns the primitive data type of a value, such as String.
A value’s type is taken from its runtime representation and is never one of
the arithmetic types (intersection, union, Any, or Nothing) nor a type
alias. If present, metadata of a value is included in the result of
typeOf (see metadataOf).
Parameters
| Name | Description |
|---|---|
|
Input value to evaluate. |
Example
This example identifies the type of several input values.
Source
%dw 2.0
output application/json
---
[ typeOf("A b"), typeOf([1,2]), typeOf(34), typeOf(true), typeOf({ a : 5 }) ]DataWeaveOutput
[ "String", "Array", "Number", "Boolean", "Object" ]JSONExample
This example shows that the type of a value is independent of the type with which it is declared.
Source
%dw 2.0
output application/json
var x: String | Number = "clearly a string"
var y: "because" = "because"
---
[typeOf(x), typeOf(y)]DataWeaveOutput
["String", "String"]JSON