filter-expressions/CHANGELOG.md

Basic array structure that can conditionally validate objects

# Changelog

## v2.

Goals:

- Keep portability of JSON declaration
- Compile to optimised javascript

### Breaking changes

- "==" is now equivalent of "===" comparison, and is not a deep comparison, for deep comparisons use "equals"
- "<=", "<", ">", ">=" will now ensure that the types are equivalent
- "match" is now "to-regex" and "regex-test" for regular expression matching: ["match", "prop", "^[A-Z]+$", "i"] becomes ["regex-test", "prop", ["to-regex", "^[A-Z]+$", "i"]]
- "date" is now "to-date"
- Removed support for "geo" based comparisons, to be implemented as optional instruction sets
- Removed comparison and operator options. These are replaced by implementing instructions
- When selecting a property from the context object, include \$varname opposed to just "varname" (which is the same as calling ["get", "varname"])

### New features

- "!" negate
- type casting support, "to-date", "to-boolean", "to-string", "to-number" and "typeof"
- "equals", "equal", "!equal", "!equals" for deep compare object (using lodash.isequal)
- "<", ">", "!=", "==", "<=", ">=" Compares dates
- "lowercase", "downcase", "uppercase", "upcase" to transform text case
- "length" for length of array and strings
- Optional instructions. Provide your own function implementations

### Improvements

- Removes switch statements in favour of a register