countCharactersBy

countCharactersBy(text: String, predicate: (character: String) -> Boolean): Number

Counts the number of times an expression that iterates through each character in a string returns true.

Introduced in DataWeave version 2.4.0.

Name Description

Name	Description
`text`	The string to which the `predicate` applies.
`predicate`	Expression to apply to each character in the `text` string. The expression must return a Boolean value.

text

The string to which the predicate applies.

predicate

Expression to apply to each character in the text string. The expression must return a Boolean value.

This example counts the digits in a string.

%dw 2.0
import * from dw::core::Strings
output application/json
---
"42 = 11 * 2 + 20" countCharactersBy isNumeric($)DataWeave

7Json

Helper function to make countCharactersBy work with a null value.

Introduced in DataWeave version 2.4.0.