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A TypeScript isomorphic adaptation of Java's Optional.
Eslint rule to prevent undefined declaration in favor of optional chaining (?) operator in Typescript
Clean type handling for the Go programming language with undefinable and nullable generic types.
Flexible Data Validation Module with Built in default Types.
Guard against null or undefined values
This is an alternative to the lodash's merge function, but it does overwrite values with undefined
repositorio para o vĂdeo gravado para o youtube sobre variáveis javascript, var, let e const e escopo
Is a simple npm package to check if sent arguments are null or undefined.
A set of useful utility functions for JavaScript run-time type checking and inspection.
A simple library to determine whether the object is null-like or not.
Functions that check if argument is, or is not, undefined or null
get rid of exception and give default value for null or undefined properties.
Safe navigation using ES2015 Proxies
A simple utility to find out falsy values from an object or arrays.
Use hasNil to traverse chained object properties and check for null or undefined values.
Difference between null and undefined
Formerly rhumsaa/uuid. A PHP 5.4+ library for generating RFC 4122 version 1, 3, 4, and 5 universally unique identifiers (UUID).
Checking how undefined string and number variables handles truthiness
A simple, lightweight JavaScript API for handling browser cookies