Lifecycle of Components Each component in React has a lifecycle which you can monitor and manipulate during its three main phases. The three phases are: Mounting, Updating, and Unmounting. Mounting Mounting means putting elements into the DOM. React has four built-in methods that gets called, in this order, when mounting a component: constructor() getDerivedStateFromProps() …

Purpose We will assume that we are starting from two JSON strings and, at the end, we want to obtain a single JSON string with the merged objects. How to merge 2 JSON objects together We will start our code by defining two JSON strings containing two different objects. These are the objects we will merge. const string1…

What is a pointer? If you have a variable ‘var’ in your program, ‘&var’ will give you the address in memory of the variable ‘var’. Pointer variables are special variables that are used to store addresses rather than values. A pointer is a variable that stores the memory address of another variable as its…

Criteria There should be no default constructor. There should be only one constructor, which takes in the initial balance in dollars, and the password. The password is an integer, most likely 4 digits, but we won’t enforce that limit here (which means it can even be negative). The initial amount, however…

Assume the following variable declarations: int foo = 0; int *ptr = &foo; What statements will change the value of foo to 1? (*ptr)++; foo++; 2. Write a function countMatches which compares 2 C strings and count the number of matching characters. void countMatches(const char *str1, const char *str2, int…

Inside Class Definition class MyClass { // The class public: // Access specifier void myMethod() { // Method/function defined inside the class cout << "Hello World!"; } }; int main() { MyClass myObj; // Create an object of MyClass myObj.myMethod(); // Call the method return 0; } In the following example, we define…

Question Write a function named deleteG that accepts one character pointer as a parameter and returns no value. The parameter is a C string. This function must remove all of the upper and lower case 'g' letters from the string. The resulting string must be a valid C string. Your function…

Question Create a method that searches through str for the character chr. If the chr is found, it returns a pointer into str where the character was first found, otherwise nullptr (not found). Explanation findTheChar method has 2 parameters, an array of char, which is the c style string, and chr, which…