From 7c5f1d5a0553b2969b0f683a5025034adb9660a2 Mon Sep 17 00:00:00 2001
From: denisf2 <124052583+denisf2@users.noreply.github.com>
Date: Wed, 20 Mar 2024 18:50:02 +0300
Subject: [PATCH] Delete
 tracks/cpp/exercises/atbash-cipher/atbash-cipher/mentoring.md

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-# Mentoring
-
-## Reasonable solutions
-```cpp
-#include <string>
-
-namespace atbash_cipher
-{
-
-std::string apply_cypher(std::string aStr);
-std::string apply_spaces(const std::string& aStr);
-
-std::string encode(const std::string& aStr)
-{
-	auto str = apply_cypher(aStr);
-	return apply_spaces(str);
-}
-
-std::string apply_spaces(const std::string& aStr)
-{
-	std::string out;
-	out.reserve(aStr.length() + aStr.length() / 5);
-	for(size_t i = 0; i < aStr.length(); ++i)
-	{
-		if(0 != i && 0 == i % 5)
-			out.push_back(' ');
-		out.push_back(aStr[i]);
-	}
-
-	return out;
-}
-
-std::string decode(const std::string& aStr)
-{
-	return apply_cypher(aStr);
-}
-
-std::string apply_cypher(std::string aStr)
-{
-	auto wr_it = std::begin(aStr);
-	for(auto rd_it = std::cbegin(aStr); rd_it != std::cend(aStr); ++rd_it)
-	{
-		if(std::isalpha(*rd_it))
-		{
-			const auto a = static_cast<int>('a'); 
-			const auto z = static_cast<int>('z');
-			*wr_it = static_cast<char>(z - std::tolower(*rd_it) + a);
-			++wr_it;
-		}
-		else if(std::isdigit(*rd_it))
-		{
-			*wr_it = *rd_it;
-			++wr_it;
-		}
-	}
-
-	aStr.erase(wr_it, aStr.end());
-
-	return aStr;
-}
-}  // namespace atbash_cipher
-
-```
-## Common suggestions
-
- - The atbash cipher is symmetrical that is why it is possible to use one function to encode and decode. Ask a student to refactor. `Could you extract chunk splitting code and make refactoring of you code taking in account that fact?`
- - Passing function non-POD arguments by value (here usually std::string).
-   - Explain the problem of time efficiency
-   - Ask use references or lightweight objects (here std::string_view)
- - Students usually use mapping algorithm (map/array chars)
-   - Explain what is ASCII table, char type
-   - Ask refactor code using math equation to mutate a char
- - Introduce to a student standart functions to check character (std::isalpha/std::isalnum/..)
-
-## Talking points
-