Este método se usa para indicar si dos objetos Char adyacentes en una posición específica en una string forman un par sustituto o no.
Sintaxis:
public static bool IsSurrogatePair (string s, int index);
Parámetros:
s : es una string.
index : Es la posición inicial del par de caracteres a evaluar dentro de s .
Valor devuelto: este método devuelve verdadero si el parámetro s incluye caracteres adyacentes en las posiciones índice e índice + 1 , y el valor numérico del carácter en la posición índice va desde U+D800 hasta U+DBFFy el valor numérico del carácter en la posición índice + 1 va desde U+DC00a través de U+DFFFlo contrario, devuelve falso .
Excepciones:
- ArgumentNullException: si la s es nula.
- ArgumentOutOfRangeException: si el índice no es una posición dentro de s .
Los siguientes programas ilustran el uso del método Char.IsSurrogatePair(String, Int32):
Ejemplo 1:
// C# program to demonstrate the
// Char.IsSurrogatePair(String,
// Int32) Method
using System;
class GFG {
// Main Method
public static void Main()
{
try {
// calling check() Method
check("1234", 3);
check("Tsunami", 3);
check("psyc0lo", 4);
// declaring and initializing string s1
string s1 = new String(new char[] {'a',
'\uD800', '\uDC00', 'z' });
check(s1, 1);
}
catch (ArgumentNullException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
catch (ArgumentOutOfRangeException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
// Defining check() method
public static void check(string s, int i)
{
// checking condition
// using IsSurrogatePair() Method
bool val = Char.IsSurrogatePair(s, i);
// checking
if (val)
Console.WriteLine("String '{0}' contains "
+ "Surrogate pairs at s[{1}] and s[{2}]",
s, i, i + 1);
else
Console.WriteLine("String '{0}' does't contain any "
+ "Surrogate pairs at s[{1}] and s[{2}]",
s, i, i + 1);
}
}
Producción:
String '1234' does't contain any Surrogate pairs at s[3] and s[4] String 'Tsunami' does't contain any Surrogate pairs at s[3] and s[4] String 'psyc0lo' does't contain any Surrogate pairs at s[4] and s[5] String 'að??z' contains Surrogate pairs at s[1] and s[2]
Ejemplo 2: para ArgumentNullException
// C# program to demonstrate the
// Char.IsSurrogatePair(String,
// Int32) Method
using System;
class GFG {
// Main Method
public static void Main()
{
try {
// calling check() Method
check("1234", 3);
check("Tsunami", 3);
check("psyc0lo", 4);
// declaring and initializing string s1
string s1 = new String(new char[] {'a',
'\uD800', '\uDC00', 'z' });
check(s1, 1);
Console.WriteLine("");
Console.WriteLine("s is null");
check(null, 4);
}
catch (ArgumentNullException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
catch (ArgumentOutOfRangeException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
// Defining check() method
public static void check(string s, int i)
{
// checking condition
// using IsSurrogatePair() Method
bool val = Char.IsSurrogatePair(s, i);
// checking
if (val)
Console.WriteLine("String '{0}' contains "
+ "Surrogate pairs at s[{1}] and s[{2}]",
s, i, i + 1);
else
Console.WriteLine("String '{0}' does't contain any "
+ "Surrogate pairs at s[{1}] and s[{2}]",
s, i, i + 1);
}
}
Producción:
String '1234' does't contain any Surrogate pairs at s[3] and s[4] String 'Tsunami' does't contain any Surrogate pairs at s[3] and s[4] String 'psyc0lo' does't contain any Surrogate pairs at s[4] and s[5] String 'að??z' contains Surrogate pairs at s[1] and s[2] s is null Exception Thrown: System.ArgumentNullException
Ejemplo 3: para ArgumentOutOfRangeException
// C# program to demonstrate the
// Char.IsSurrogatePair(String,
// Int32) Method
using System;
class GFG {
// Main Method
public static void Main()
{
try {
// calling check() Method
check("1234", 3);
check("Tsunami", 3);
check("psyc0lo", 4);
// declaring and initializing string s1
string s1 = new String(new char[] {'a',
'\uD800', '\uDC00', 'z' });
check(s1, 1);
Console.WriteLine("");
Console.WriteLine("index is less than zero");
check("null", -4);
}
catch (ArgumentNullException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
catch (ArgumentOutOfRangeException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
// Defining check() method
public static void check(string s, int i)
{
// checking condition
// using IsSurrogatePair() Method
bool val = Char.IsSurrogatePair(s, i);
// checking
if (val)
Console.WriteLine("String '{0}' contains "
+ "Surrogate pairs at s[{1}] and s[{2}]",
s, i, i + 1);
else
Console.WriteLine("String '{0}' does not contain any "
+ "Surrogate pairs at s[{1}] and s[{2}]",
s, i, i + 1);
}
}
Producción:
String '1234' does not contain any Surrogate pairs at s[3] and s[4] String 'Tsunami' does not contain any Surrogate pairs at s[3] and s[4] String 'psyc0lo' does not contain any Surrogate pairs at s[4] and s[5] String 'að??z' contains Surrogate pairs at s[1] and s[2] index is less than zero Exception Thrown: System.ArgumentOutOfRangeException
Referencia:
Publicación traducida automáticamente
Artículo escrito por RohitPrasad3 y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA