types

types

Node.js

// primitives
const myBool = true
const myNumber = 10
const myString = 'foo'
const mySymbol = Symbol('bar')
const myNull = null
const myUndefined = undefined

// object types
const myObject = {}
const myArray = []
const myFunction = function() {}
const myError = new Error('error')
const myDate = new Date()
const myRegex = /a/
const myMap = new Map()
const mySet = new Set()
const myPromise = Promise.resolve()
const myGenerator = function *() {}
const myClass = class {}

Go

package main

func main() {
    // primitives
    var myBool bool = true
    var myInt int = 10
    var myInt8 int8 = 10
    var myInt16 int16 = 10
    var myInt32 int32 = 10
    var myInt64 int64 = 10
    var myUint uint = 10
    var myUint8 uint8 = 10
    var myUint16 uint16 = 10
    var myUint32 uint32 = 10
    var myUint64 uint64 = 10
    var myUintptr uintptr = 10
    var myFloat32 float32 = 10.5
    var myFloat64 float64 = 10.5
    var myComplex64 complex64 = -1 + 10i
    var myComplex128 complex128 = -1 + 10i
    var myString string = "foo"
    var myByte byte = 10  // alias to uint8
    var myRune rune = 'a' // alias to int32

    // composite types
    var myStruct struct{} = struct{}{}
    var myArray []string = []string{}
    var myMap map[string]int = map[string]int{}
    var myFunction func() = func() {}
    var myChannel chan bool = make(chan bool)
    var myInterface interface{} = nil
    var myPointer *int = new(int)
}