Predicate Packages

Helps you deny the existence of specified truthy values (e.g. 'someString', aParticularObject)

Minimal and composable type guard (aka: type predicate) functions.

A deep (recursive) version of Ramda.js's where and whereEq, allowing nested JSON-like structures to be used as predicates (for filtering and so on) for use on similar JSON-like structures

RxJS operator. Packs all the source Observable values into arrays. New array is emitted every time a predicate is fulfilled.

Define logical conditions to test an input value.

Return the first element of an array where the callback returns true.

Refute module.

Checks if value is the dict

A simple utility for creating flexible sorting predicates for arrays of objects in JavaScript and TypeScript.

Bunch of stateful predicate wrappers. RxJS & Array.filter compliant.

Predicate and assert functions generator from type definitions.

uinix fp utility to test if a value is a plain JS object

uinix fp utility to test JS-truthiness of values

TypeScript predicates and assertions library

A javascript library for parsing rsql expressions into predicates.

Extra widgets for Mozilla's react-jsonschema-form

A library for declarative programming with higher order functions

Type checking utils.

Type predicate functions for checking if a value is of a specific type or asserting that it is.

Check if function is an ES6 class.