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)