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How to Invert Strings in Go

Strings in Go are represented as vectors of bytes, unlike C where they are treated as character arrays. This can make string manipulation in Go somewhat challenging, especially when dealing with Unicode characters.

Reversing a String

In Go, reversing a string involves the following steps:

• Create a new byte array to store the reversed string.
• Iterate over the original string from beginning to end, copying each character to the corresponding position in the reversed array.
• Return the reversed array as a string.

Code Example

<code class="go">func reverseString(str string) string {
    reversed := make([]byte, len(str))
    for i := range str {
        reversed[len(str)-i-1] = str[i]
    }
    return string(reversed)
}</code>

Handling Unicode Characters

When working with Unicode characters, it's important to consider the following:

• Unicode characters are not stored as individual bytes, but as a sequence of bytes.
• The length of a Unicode character in bytes can vary depending on its Unicode codepoint.

To handle Unicode characters correctly, it's recommended to use Go's built-in functions, such as unicode.IsLetter() and unicode.RuneCountInString(), to determine the character boundaries within a string.

Additional Considerations

• Combining Diacritical Marks: Some Unicode characters, known as combining diacritical marks, can modify the appearance of adjacent characters. These marks should be treated as part of the preceding character when reversing the string.
• Emoji and Emoticons: Emojis and emoticons are composed of multiple Unicode characters. When reversing a string containing emojis, it's important to preserve the order of the individual characters within the emoji.

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