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v4.5
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    v4.5

      substring()

      Overview

      The substring() function returns a substring extracted from the given string, with the specified start zero-based index and continuing for the specified number of characters.

      Syntax

      substring(str, start, length)

      Argument Type
      Description
      str String The string to extract substring from
      start Integer ≥ 0 The index where the substring begins
      length Integer > 0 The number of characters in the substring

      Return type: String

      Example of Result

      return substring("a database", 2, 4)
      

      Result: data

      Example of Use

      Extract the first 150 characters of the post content as a preview.

      find().nodes({@post.title == "High Density Parallel Computing"}) as post
      return substring(post.content, 0, 150)
      
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