That's Italian for ruler
Here's how to get the proper length of a Unicode string, which is not the same a standard string length.
A couple of ways are shown.
Source Code
using System;
using System.Globalization;
using System.Diagnostics;
public class Program
{
public static void Main()
{
// 140字以下かどうかのチェックを行い超えている場合はconfigに従って動作する
//🎶🔥é- is standard length of 6, but there are ONLY 4 characters! Why not len=4?
//🎶🔥 are double byte UNICODE characters (> \u10000) of width or len 2 each
//🎶🔥é- below will replace space after lasting character '-' (position 4) with a sub using most common techniques seen online
string s = "𠇰😈🎶🔥é-";
string s2 = "𠇰😈🎶🔥é-";
Stopwatch sw = new Stopwatch();
sw.Start();
int typicalen = s.Length;
sw.Stop();
Console.WriteLine("Normal String {0} len = {1} in {2} ticks.",s, typicalen, sw.ElapsedTicks.ToString("N0"));
StringInfo stringInfoThrowAway = new StringInfo("Preload this function"); //Results vary if you move this before or after below implementations
sw.Reset();
sw.Start();
StringInfo stringInfo = new StringInfo(s2);
int stringInfoLength = stringInfo.LengthInTextElements;
sw.Stop();
Console.WriteLine("new StringInfo {0} len = {1} in {2} ticks.",s,stringInfoLength, sw.ElapsedTicks.ToString("N0"));
sw.Reset();
sw.Start();
int[] textElemIndex = StringInfo.ParseCombiningCharacters(s);
int tEILength = textElemIndex.Length;
sw.Stop();
Console.WriteLine("ParseCombiningCharacters String {0} len = {1} in {2} ticks.",s,tEILength, sw.ElapsedTicks.ToString("N0"));
sw.Reset();
sw.Start();
// Use the enumerator returned from GetTextElementEnumerator
// method to examine each real character.
TextElementEnumerator charEnum = StringInfo.GetTextElementEnumerator(s);
int i = 0;
while (charEnum.MoveNext())
{
i++;
}
sw.Stop();
Console.WriteLine("GetTextElementEnumerator String {0} len = {1} in {2} ticks.",s,i, sw.ElapsedTicks.ToString("N0"));
sw.Reset();
sw.Start();
char[] charsInString = s.ToCharArray();
int charLength = s.Length;
sw.Stop();
Console.WriteLine("ToCharArray {0} len = {1} in {2} ticks.",s,charLength, sw.ElapsedTicks.ToString("N0"));
}
}
