함수 index()

index()
array_search()

1 Java

자바 array_search() 문서를 참고하십시오.

public class MyClass {
    public static void main(String args[]) {
        String fruits[] = {"Banana", "Orange", "Apple", "Orange", "Mango", "Orange"};
        int index = -1;
        for(int i=0; i<fruits.length; i++) {
            if( fruits[i].equals("Orange") ) { index=i; break; }
        }
        System.out.println( index ); // 1
        
        index = -1;
        for(int i=0; i<fruits.length; i++) {
            if( fruits[i].equals("Pineapple") ) { index=i; break; }
        }
        System.out.println( index ); // -1
    }
}

2 PHP

PHP array_search() 문서를 참고하십시오.

$fruits = ['Banana', 'Orange', 'Apple', 'Orange', 'Mango', 'Orange'];
var_dump( array_search('Orange', $fruits) );
# int(1)
var_dump( array_search('Pineapple', $fruits) );
# bool(false)

3 Python

fruits = ['Banana', 'Orange', 'Apple', 'Orange', 'Mango', 'Orange']
print( fruits.index('Orange') )
# 1
print( fruits.index('Orange', 4) )
# 5
print( fruits.index('Orange', 2, 6) )
# 3

fruits = ['Banana', 'Orange', 'Apple', 'Mango']
print( fruits.index('Pineapple') )
# ValueError: 'Pineapple' is not in list

4 같이 보기