FHIRPath Function: join

{:.stu}

The join function takes a collection of strings and joins them into a single string, optionally using the given separator. {:.stu}

If the input is empty, the result is empty. {:.stu}

If no separator is specified, the strings are directly concatenated. {:.stu}

The following example illustrates the behavior of the .join operator: {:.stu}

('A' | 'B' | 'C').join() // 'ABC'
('A' | 'B' | 'C').join(',') // 'A,B,C'

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Summary

• Category: Additional String Functions
• Section: 5.7.7
• Return Type: String
• Empty Input Result: empty
• Errors on Multiple Input: false

Description

Combines the elements in the input collection into a single string, separated by separator. If no separator is specified, the elements are concatenated directly.

Arguments

• separator (optional): String - Optional separator to use between elements

Type Mapping

• String-String

Example

{'a', 'b', 'c'}.join(',') // 'a,b,c'
{'a', 'b', 'c'}.join() // 'abc'