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JavaScript variables hold different types of data: primitives (Undefined, Null, Boolean, Number, String) and objects (reference types). Primitive values are stored directly in memory, while objects are stored as references. Primitive vs Reference Types Primitive values are immutable. When copied, a new independent value is created: let a = 1; l ...

The Reference Assignment Problem Consider a scenaroi where a source array is assigned to a temporary variable for filtering. A common mistake is assuming that the temporary variable is an independent copy. function filterData() { // 'masterRecords' acts as the source of truth let masterRecords = this.masterRecords; // ERROR: ' ...

Vector Prototype Implementation This implementation demonstrates mathematical vector encapsulation in Java with dynamic memory allocation for variable-length vectors. It showcases both shallow and deep cloning techniques for copying vector objects. Shallow Cloning Approach In shalow cloning, only the object itself is duplicated, while referance ...

Primitive assignments in Java duplicate the actual value: int count = 10; int tally = count; This behavior applies to all eight primitive types. Object variables, however, store memory addresses rather than the objects themselves. Direct assignment therefore creates an alias, not an independent entity: class Employee { private int badgeId; ...

// Assigning a value from a to b let a = 12; let b = a; This method works for primitive types. What happens if a is an object? Let's examine what occurs in memory: Declaring a = 12 allocates a space in the stack. When a is assigned to b, another space is created in the stack, and b holds the same value as a. If a is an object, what happens in ...

A custom string class typically wraps a dynamically alocated character array along with size and capacity tracking. The following implementation lives inside a dedicated namespace to avoid collisions with the standard library. namespace custom { class string { private: char* _data; size_t _len; size_t _cap; ...