isNumeric

DataWeave 2.2 is compatible and bundled with Mule 4.2. This version of Mule reached its End of Life Leaving the Site on May 2, 2023, when Extended Support ended.

Deployments of new applications to CloudHub that use this version of Mule are no longer allowed. Only in-place updates to applications are permitted.

MuleSoft recommends that you upgrade to the latest version of Mule 4 that is in Standard Support so that your applications run with the latest fixes and security enhancements.

isNumeric(String): Boolean

Checks if the text contains only Unicode digits.

A decimal point is not a Unicode digit and returns false. Note that the method does not allow for a leading sign, either positive or negative.

Introduced in DataWeave 2.2.0. Supported by Mule 4.2 and later.

Parameters

Name Description

Name	Description
`text`	The input string.

text

The input string.

Example

This example shows how isNumeric behaves with different inputs and sizes.

Source

%dw 2.0
import isNumeric from dw::core::Strings
output application/json
---
{
  "a": isNumeric(null),
  "b": isNumeric(""),
  "c": isNumeric("  "),
  "d": isNumeric("123"),
  "e": isNumeric("१२३"),
  "f": isNumeric("12 3"),
  "g": isNumeric("ab2c"),
  "h": isNumeric("12-3"),
  "i": isNumeric("12.3"),
  "j": isNumeric("-123"),
  "k": isNumeric("+123")
}DataWeave

Output

{
  "a": false,
  "b": false,
  "c": false,
  "d": true,
  "e": true,
  "f": false,
  "g": false,
  "h": false,
  "i": false,
  "j": false,
  "k": false
}JSON

isNumeric(Null): Boolean

Helper function for isNumeric so it works with null value.