For a given input string str, find how many spaces are there in the string and replace those spaces with *
e.g. str = 'this is demo of replacing spaces with stars';
out = 'this*is*demo*of*replacing*spaces*with*stars'
Project Euler: Problem 1, Multiples of 3 and 5
Find the hypotenuse
04 - Scalar Equations 2
Determine the square root
Find offset of given matrix element from first matrix element
Back to basics - mean of corner elements of a matrix
Matrix rotation as per given angle
Create a v-notch vector without "sort" function
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