JS Built-ins
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ObjectObject.isbeginner

Object.is() — distinguishes +0 from -0

📖 Usage Example
// Strict identity that handles edge cases
Object.is(NaN, NaN)   // → true  (unlike ===)
Object.is(0, -0)      // → false (unlike ===)
Object.is(1, 1)       // → true

Use Object.is() for strict value comparison that correctly handles NaN equality and distinguishes +0 from -0.

Object.is() — positive and negative zero

Object.is(+0, -0) returns false, unlike +0 === -0 which is true. This is one of the key differences between Object.is and ===.

Challenge: Implement zeroDiff() that returns Object.is(0, -0).

zeroDiff()   // → false  (unlike 0 === -0 which is true)
💡 Hints (1)
  • • `Object.is` distinguishes `+0` and `-0` whereas `===` treats them as equal.