함수 strpos()

find string

strpos

IndexOf

InStr

FIND

SEARCH

1 C++

C++ find() 문서를 참고하십시오.

#include <iostream>
using namespace std;
int main() {
	string s = "Hello World!";
	int pos = s.find("H");
	cout << pos << endl; // 0
	cout << s.find("ll") << endl; // 2
	cout << s.find("e") << endl; // 1
	cout << s.find("z") << endl; // 18446744073709551615
}

2 C#

string str = "Hello World!";
int pos = str.IndexOf("ll");	// 2

"Hello mate".IndexOf("e");	// 1
"Hello mate".IndexOf("e", 4);	// 9
"word".IndexOf("z");		// -1

3 Excel

• 1-based index

=FIND("h", "hello world")
=SEARCH("h", "hello world")
// 1
=FIND("ll", "hello world")
=SEARCH("ll", "hello world")
// 3
=FIND("z", "hello world")
// #VALUE!

4 Java

String str = "Hello World!";
int pos = str.indexOf("ll");	// 2

"Hello mate".indexOf("e");	// 1
"Hello mate".indexOf("e", 4);	// 9
"word".indexOf("z");		// -1

5 JavaScript

console.log("Hello mate".indexOf("e")); // 1
console.log("Hello mate".indexOf("e",4)); // 9
console.log("Hello mate".indexOf("z",4)); // -1

6 Lisp

(search "e" "Hello mate")             ;  returns 1
(search "z" "word")                   ;  returns NIL

7 Objective-C

[@"do you remember?" rangeOfString:@"you"]; // returns NSMakeRange(3, 3)
[@"do you remember?" rangeOfString:@"e" options:0 range:NSMakeRange(11, 5)]; // returns NSMakeRange(13, 1)
[@"do you remember?" rangeOfString:@"z"]; // returns NSMakeRange(NSNotFound, 0)

#define STRPOS(str, x) [Util strpos:str sub:x]
+(int) strpos:(NSString*)str sub:(NSString*)sub {
    int pos = [str rangeOfString:sub].location;
    return (pos == NSNotFound)? -1 : pos;
}
NSLog(@"%d", STRPOS(@"do you remember?", @"you")); // 3
NSLog(@"%d", STRPOS(@"do you remember?", @"e")); // 8
NSLog(@"%d", STRPOS(@"do you remember?", @"z")); // -1

8 Perl

index("do you remember?", "you"); # returns 3
index("do you remember?", "e", 11); # returns 13
index("word", "z"); # returns -1

9 PHP

PHP strpos() 문서를 참고하십시오.

var_dump( strpos("do you remember?", "d") ); // int(0)
var_dump( strpos("do you remember?", "you") ); // int(3)
var_dump( strpos("do you remember?", "e", 11) ); // int(13)
var_dump( strpos("word", "z") ); // bool(false)

if(strpos("word", "z") === false) {
        echo "not exist";   
}

10 Python

"do you remember?".find("you") # returns 3
"do you remember?".find("e", 11) # returns 13
"word".find("z") # returns -1
"word".index("z") # raises ValueError

11 Ruby

"do you remember?".index("you") # returns 3
"do you remember?".index("e", 11) # returns 13
"word".index("z") # returns nil

12 Scheme

(use-modules (srfi srfi-13))
(string-contains "Hello mate" "e")    ;  returns 1
(string-contains "word" "z")          ;  returns #f

13 VB

InStr("Hello mate", "e")              '  returns 2
InStr(5, "Hello mate", "e")           '  returns 10
InStr("word", "z")                    '  returns 0

14 같이 보기

• 함수 contains() (has_string)
• 함수 reverse_find()
• 함수 find_character()
• 함수 str_replace()
• 함수 substr_count()