Description: The equals function is very widely used and determines if its subject is equal to another String value. Note that the equals function performs a direct comparison of two String values. Take care not to confuse this function with the matches function, which evaluates its subject against a Regular Expression.

Subject Type: Any

Arguments:

Return Type: Boolean

Examples: We can check if the filename of a FlowFile is "hello.txt" by using the expression ${filename:equals('hello.txt')}, or we could check if the value of the attribute hello is equal to the value of the filename attribute: ${hello:equals( ${filename} )}.