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Reverse String
Reverse String

Reverse String

Easy
OverviewCommunity Solutions

Introduction

Reversing strings (reading them from right to left, rather than from left to right) is a surprisingly common task in programming.

For example, in bioinformatics, reversing the sequence of DNA or RNA strings is often important for various analyses, such as finding complementary strands or identifying palindromic sequences that have biological significance.

Instructions

Your task is to reverse a given string.

Some examples:

  • Turn "stressed" into "desserts".
  • Turn "strops" into "sports".
  • Turn "racecar" into "racecar".

Unicode and grapheme clusters

This exercise includes tests with Unicode strings that contain grapheme clusters. Perl's builtin string processing functions are unsufficient to handle these strings. Here are a couple of resources to help you:

Source

Introductory challenge to reverse an input stringThe link opens in a new window or tab
Edit via GitHub The link opens in a new window or tab
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Deep Dive into Reverse String!

Explore 14 different ways to reverse a string, exploring a range of topics including Unicode Codepoints, Graphemes, Stack vs Heap allocations, and pointers. Kick back and enjoy 45mins of learning with Jeremy and Erik.