Types of Equality in Programming languages

links: YDK JS Chapter 2

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There are two types of equality

1. Structural Equality
2. Reference Equality

Structural Equality

Structural equality asks if two references are the same value

let x = 10

let y = 2 * 5

console.log(x == y)

The above prints true as both the values are equal

Reference Equality

Reference Equality asks if two reference addresses are same

let x = {name: "Subramanya"}
let y = x

console.log(x === y) // true

The above one prints true because both x and y point to same reference

where as

let x = {name: "Subramanya"}
let y = {name: "Subramanya"}

console.log(x === y) // false

this will print false as both the references (address) of objects are different

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tags: fundamentals

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