In this tutorial I go over one problem solving approach referred to as the "Two Pointer Approach". It is a common solution used for array interview questions and can lend well in helping you solve other programming interview questions that use array traversal. The solution is coded in Java but can be applied to any other language like C++, C, JavaScript, Python etc.
java.utils.Collections.swap : https://docs.oracle.com/javase/7/docs...)
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