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. 

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isDate

Last modified 2yr ago