함수 CharAt()

1 개요

charAt
characterAtIndex

Returns character at index in the string.
Equivalent: See substring of length 1 character.

2 ALGOL 68

"Hello, World"[2];         // 'e'

3 C++

C++ .at() 문서를 참고하십시오.

#include <iostream>
using namespace std;
int main() {
	string s = "World";
	cout << s.at(0) << endl; // W
	cout << s.at(1) << endl; // o
	cout << s.at(2) << endl; // r
}

4 C#

string str = "Hello, World";
char ch = str[1];
// 'e'

5 Excel

=MID("hello",1,1)
// h
=MID("hello",2,1)
// e
=MID("hello",3,1)
// l

6 Go

Go charAt() 문서를 참고하십시오.

package main

import "fmt"

func main() {
    s := "hello"
    fmt.Println(s[0])
    fmt.Println(string(s[0]))
    fmt.Printf("%c\n", s[0]) // e
}

7 Java

String str = "Hello, World";
str.charAt(2);  // 'l'

8 JavaScript

var str = "Hello, World";
console.log( str.charAt(7) );  // W

9 Objective-C

#define CHAR_AT(str, n) [str substringWithRange:NSMakeRange(n,1)]
NSString* ch = CHAR_AT(@"A가★あ中", 2);
NSLog(@"%@", ch); // ★

NSString* str = @"A가★あ中";
unichar ch = [str characterAtIndex:2];
NSLog(@"%C", ch); // ★

10 Pascal

var 
  MyStr: string = 'Hello, World';
  MyChar: Char;
begin
  MyChar := MyStr[2];         // 'e'

11 Perl

$str = 'Hello, World';
substr($str, 2, 1);  # 'l'
substr($str, -3, 1); # 'r'

12 PHP

$str = "Hello";
echo $str[1]; // e

13 Python

print( "Hello, World"[2]  )  # l
print( "Hello, World"[-3] )  # r

14 Ruby

print "Hello, World"[2]   # l
print "Hello, World"[-3]  # r

15 Smalltalk

'Hello, World' at: 2.    "$e"

16 VB

GetChar("Hello, World", 2) '  "e"

17 VB.NET

"Hello, World".Chars(2)    '  "l"

18 같이 보기

19 참고

http://eqcode.com/wiki/CharAt