Logical Checks

Use these functions for yes-or-no checks such as emptiness, existence, negation, and assertions.

Functions

5 primary matchs and 5 additional helpers that are also useful for this kind of task.

Primary matches

Start here when this is the main kind of work you need to do.

• $boolean
• $exists
• $isEmpty
• $isNumeric
• $not

Also useful here

These functions live in another primary category but still help with the same kind of task.

• $assert
• $contains
• $endsWith
• $matches
• $startsWith