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predicate

Predicate module - Composable predicates for filtering, validation, and type narrowing.

Predicates are functions that take a value and return a boolean. They can be composed using combinators like and, or, and not.

Example​

import * as R from 'remeda'
import { gt, lt, and, where } from 'receta/predicate'

// Basic filtering
const numbers = [1, 5, 10, 15, 20]
R.filter(numbers, and(gt(5), lt(15))) // => [10]

// Object filtering
const users = [
  { age: 25, active: true },
  { age: 17, active: true },
  { age: 30, active: false }
]
R.filter(users, where({
  age: gt(18),
  active: Boolean
})) // => [{ age: 25, active: true }]

References​

always​

Re-exports always

and​

Re-exports and

between​

Re-exports between

by​

Re-exports by

endsWith​

Re-exports endsWith

eq​

Re-exports eq

gt​

Re-exports gt

gte​

Re-exports gte

hasProperty​

Re-exports hasProperty

includes​

Re-exports includes

isArray​

Re-exports isArray

isBoolean​

Re-exports isBoolean

isDate​

Re-exports isDate

isDefined​

Re-exports isDefined

isEmpty​

Re-exports isEmpty

isError​

Re-exports isError

isFiniteNumber​

Re-exports isFiniteNumber

isFunction​

Re-exports isFunction

isInstanceOf​

Re-exports isInstanceOf

isInteger​

Re-exports isInteger

isNotEmpty​

Re-exports isNotEmpty

isNull​

Re-exports isNull

isNullish​

Re-exports isNullish

isNumber​

Re-exports isNumber

isObject​

Re-exports isObject

isPromise​

Re-exports isPromise

isRegExp​

Re-exports isRegExp

isString​

Re-exports isString

isUndefined​

Re-exports isUndefined

lt​

Re-exports lt

lte​

Re-exports lte

matches​

Re-exports matches

matchesShape​

Re-exports matchesShape

neq​

Re-exports neq

never​

Re-exports never

not​

Re-exports not

oneOf​

Re-exports oneOf

or​

Re-exports or

Predicate​

Re-exports Predicate

PredicateSchema​

Re-exports PredicateSchema

prop​

Re-exports prop

satisfies​

Re-exports satisfies

startsWith​

Re-exports startsWith

TypePredicate​

Re-exports TypePredicate

where​

Re-exports where

xor​

Re-exports xor