➖ Array.prototype.pop() Polyfill
Category: js / polyfills
Difficulty: medium
The pop() method removes the last element from an array and returns that element. ✅ Implementation [code example] How It Works Handles an empty array If this.length === 0, it returns undefined, just like pop(). Stores the last element Saves this[this.length - 1] before modifying the array. Modifies the array in place Reduces the length of the array by 1, effectively removing the last element. Returns the removed element Mimics pop() behavior by returning the removed item. Edge Cases Handled ✔ Works on normal arrays ✔ Works on empty arrays ([].customPop() → undefined) ✔ Modifies the original array in place ✔ Returns the last element as expected This implementation is clean, efficient, and follows Array.prototype.pop exactly. <!-- quiz-start --> Q1: What does [].customPop() return? [ ] null [ ] An empty array [x] undefined [ ] Throws an error Q2: Does pop() modify the original array? [x] Yes, it modifies the array in place [ ] No, it returns a new array [ ] Only if the array has more than one element [ ] It depends on the element type Q3: How does the pop polyfill remove the last element? [ ] Uses splice() internally [ ] Calls delete on the last element [x] Decreases the array's length property by 1 [ ] Creates a new array without the last element <!-- quiz-end -->...