Daily Archives: October 7, 2020

JavaScript || Circular Array – How To Index Into Array As If It Is Circular

The following is a module with functions which demonstrates how to index into an array as if it is circular.


1. Circular Array

The example below demonstrates the use of ‘Utils.circularWrap‘ to index into an array as if it is circular.


2. Utils Namespace

The following is the Utils.js Namespace. Include this in your project to start using!

QUICK NOTES:
The highlighted lines are sections of interest to look out for.

The code is heavily commented, so no further insight is necessary. If you have any questions, feel free to leave a comment below.

C++ || How To Find All Combinations Of Well-Formed Brackets Using C++

The following is a program with functions which demonstrates how to find all combinations of well-formed brackets.

The task is to write a function Brackets(int n) that prints all combinations of well-formed brackets from 1…n. For example, Brackets(3), the output would be:

()
(()) ()()
((())) (()()) (())() ()(()) ()()()

The number of possible combinations is the Catalan number of N pairs C(n).


1. Find All Well-Formed Brackets

The example below demonstrates the use of the ‘brackets‘ function to find all the well-formed bracket combinations.

QUICK NOTES:
The highlighted lines are sections of interest to look out for.

The code is heavily commented, so no further insight is necessary. If you have any questions, feel free to leave a comment below.

Once compiled, you should get this as your output


Pair: 1, Combination: ()
Pair: 2, Combination: (()), ()()
Pair: 3, Combination: ((())), (()()), (())(), ()(()), ()()()
Pair: 4, Combination: (((()))), ((()())), ((())()), ((()))(), (()(())), (()()()), (()())(), (())(()), (())()(), ()((())), ()(()()), ()(())(), ()()(()), ()()()()