Table of Contents
- 1 What are the differences between object reference variables and primitive data type variables?
- 2 What is the difference between Javascript primitives and objects in the context of how they are stored in memory?
- 3 What is the primary difference between passing a primitive to a method versus passing an object?
- 4 What is the difference between pass by reference and pass by pointer?
- 5 Are non-primitive variables passed by reference or value?
- 6 What is the difference between passing a primitive and an object?
What are the differences between object reference variables and primitive data type variables?
The basic difference is that primitive variables store the actual values, whereas reference variables store the addresses of the objects they refer to.
What is the difference between Javascript primitives and objects in the context of how they are stored in memory?
Primitive values are data that are stored on the stack. Reference values are objects that are stored in the heap.
What is the difference between a parameter and an argument?
Note the difference between parameters and arguments: Function parameters are the names listed in the function’s definition. Function arguments are the real values passed to the function. Parameters are initialized to the values of the arguments supplied.
What is the difference between passing a parameter of a primitive type and passing a parameter of a reference type?
When you pass primitive values to a method the values are passed to the method, but when you pass the reference variable, only the handle is copied. which means for primitives, changing the formal parameter’s value doesn’t affect the actual parameter’s value.
What is the primary difference between passing a primitive to a method versus passing an object?
When you pass a primitive, you actually pass a copy of value of that variable. This means changes done in the called method will not reflect in original variable. When you pass an object you don’t pass a copy, you pass a copy of ‘handle’ of that object by which you can access it and can change it.
What is the difference between pass by reference and pass by pointer?
Use pass-by-reference if you want to modify the argument value in the calling function. The difference between pass-by-reference and pass-by-pointer is that pointers can be NULL or reassigned whereas references cannot. Use pass-by-pointer if NULL is a valid parameter value or if you want to reassign the pointer.
What is the difference between primitives and object?
Primitive values are immutable — they cannot be changed after being created. Object references, however, are mutable and can be changed.
What is difference between primitive vs non-primitive types in JavaScript?
Data types that are known as primitive values in JavaScript are numbers, strings, booleans, null, undefined. Objects such as functions and arrays are referred to as non-primitive values. The fundamental difference between primitives and non-primitives is that primitives are immutable and non-primitives are mutable.
Are non-primitive variables passed by reference or value?
In C#, I have always thought that non-primitive variables were passed by reference and primitive values passed by value. So when passing to a method any non-primitive object, anything done to the object in the method would effect the object being passed. (C# 101 stuff)
What is the difference between passing a primitive and an object?
When you pass a primitive, you actually pass a copy of value of that variable. This means changes done in the called method will not reflect in original variable. When you pass an object you don’t pass a copy, you pass a copy of ‘handle’ of that object by which you can access it and can change it. This ‘handle’ is a ‘reference’.
What happens when you change the value of a parameter?
Now the important point is that the value is a reference for reference types – a way of getting to an object (or null). Changes to that object will be visible from the caller. However, changing the value of the parameter to refer to a different object will notbe visible when you’re using pass by value, which is the default for alltypes.
What is the difference between reference type variables and reference-type variables?
A major difference is that: reference-type variables store references to objects, so specifying a reference-type variable as an argument passes the method a copy of the reference that refers to the object.