[Solved] Consider these selectors:const selectCart = (state) => state.cart;const selectCartCount = createSelector(selectCart, cart => cart.items.length);What is the output of selectCartCount if state.cart.... | Angular

Angular - State Management

Consider these selectors:

const selectCart = (state) => state.cart;
const selectCartCount = createSelector(selectCart, cart => cart.items.length);

What is the output of selectCartCount if state.cart.items is ['apple', 'banana']?

A2

B'2'

Cundefined

DNaN

Step-by-Step Solution

Solution:

Step 1: Identify input selector output
selectCart returns the cart object with items array.
Step 2: Calculate length in derived selector
selectCartCount returns the length of the items array, which is 2.
Final Answer:
2 -> Option A
Quick Check:
Array length returns number count [OK]

Quick Trick: Array length returns number, not string [OK]

Common Mistakes:

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