$indexOfCP
Reference group: String aggregation expressions
What it does
Returns code-point index or -1 when absent.
Syntax
{$indexOfCP: [string, substring, start?, end?]}
Use case
Locate delimiters.
$indexOfCP: practical example
{ $project: { at: { $indexOfCP: ["$email", "@"] } } }💡 Explanation
Returns code-point index or -1 when absent.
When to use it
Locate delimiters.
Key Takeaways
- Returns code-point index or -1 when absent.
- Typical use: Locate delimiters.