isBuffer

isBuffer :: a → Boolean

Evaluates whether the given value is of type UInt8Array

import isBuffer from 'deep-waters/isBuffer';

const x = new Uint8Array([21, 31]);

isBuffer(x); // → true

isBuffer(20); // → false
isBuffer("hello"); // → false
isBuffer(undefined"); // → false

isBuffer, like any other type validator, is mostly used in composed validators:

import isString from 'deep-waters/isString';
import matchesPattern from 'deep-waters/matchesPattern';

const isEmail = compose(
  isString,
  matchesPattern(/^\w+([.-]?\w+)*@\w+([.-]?\w+)*(\.\w{2,3})+$/),
);

isBuffer is built on top of ofClass validator and rely on Object.prototype.toString to check on the received value type in order to avoid typeof weird behaviours and encouraging a runtime strict type validation.

isBuffer is actually a semantic shortcut to isUInt8Array.