Friday 15 March 2024

How to use splitby function ? in MuleSoft138

 How to use splitby function ? in MuleSoft

The splitBy function is a valuable tool for working with strings in MuleSoft 4. Here's a comprehensive explanation of its usage:


  • Splits a string into an array of substrings based on a specified delimiter or regular expression.

  • The delimiter is the character or pattern that separates the elements in the original string.


splitBy(text: String, regex: Regex): Array<String>


  • text: The string you want to split.

  • regex: A regular expression object defining the delimiter or pattern for splitting. You can use a literal string for simple delimiters.

Return Value:

  • An array containing the substrings obtained after splitting the original string.


  1. Splitting by comma:

%dw 2.0
// Sample string
var data = "apple,banana,orange";

// Split by comma
var fruits = data splitBy ',';

output = fruits;  // Output: ["apple", "banana", "orange"]

  1. Splitting by whitespace:

%dw 2.0
// Sample string
var text = "This is a string with spaces";

// Split by whitespace (including tabs)
var words = text splitBy anyOf(' ', '\t');

output = words;  // Output: ["This", "is", "a", "string", "with", "spaces"]

  1. Splitting using a regular expression:

%dw 2.0
// Sample string with HTML tags
var html = "<p>This is a paragraph</p>";

// Split by opening and closing paragraph tags
var paragraphs = html splitBy anyOf('<p>', '</p>');

output = paragraphs;  // Output: ["", "This is a paragraph", ""] (extra empty elements due to tag matching)

Important Considerations:

  • Empty elements: Splitting by delimiters at the beginning or end of the string might result in empty elements in the output array.

  • Regular expressions: For complex splitting logic, regular expressions offer greater control over the splitting behavior.

  • Error handling: Ensure the provided string and regular expression are valid to avoid potential errors.

Additional Notes:

  • The splitBy function is primarily used within DataWeave transformations.

  • While MEL (Message Expression Language) doesn't have a direct equivalent, you can achieve similar functionality using string manipulation functions like substring and indexOf.

Further Exploration:

By understanding the splitBy function and its nuances, you can effectively manipulate strings and extract desired data components within your MuleSoft 4 applications.

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