Creating implementation for idiom 231 : Test if bytes are a valid UTF-8 string

Idiom

# 231 Test if bytes are a valid UTF-8 string

Created by

Lead paragraph

Set b to true if the byte sequence s consists entirely of valid UTF-8 character code points, false otherwise.

New implementation

Language

Imports

Code

Documentation URL

Original attribution URL

Online runnable demo

Username

Be concise.

Be useful.

All contributions dictatorially edited by webmasters to match personal tastes.

Please do not paste any copyright violating material.

Please try to avoid dependencies to third-party libraries and frameworks.

Other implementations

using System.Text;

var encoding = new UTF8Encoding(false, true);
bool b;
try
{
    encoding.GetCharCount(s);
    b = true;
}
catch (DecoderFallbackException)
{
    b = false;
}

Demo
Doc

import java.nio.ByteBuffer
import java.nio.charset.CharacterCodingException

import static java.nio.charset.StandardCharsets.UTF_8

final decoder = UTF_8.newDecoder()
final buffer = ByteBuffer.wrap(s)
try {
    decoder.decode(buffer)
    b = true
} catch (CharacterCodingException e) {
    b = false
}

Demo

Programming-Idioms

Explain stuff

Explain stuff

Preview