함수 array_unique()

1 개요[ | ]

함수 array_unique()

중복되는 원소를 제거하고 unique한 원소만 남기는 함수

2 C++[ | ]

C++ unique() 문서를 참고하십시오.

C++

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0.5s

MEM

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#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int main() {
    vector<int> v = {1,4,5,4,4,3,2,1};
    sort(v.begin(), v.end());
    v.erase(unique(v.begin(), v.end()), v.end());
    for(const int& x: v) cout << x << ' '; // 1 2 3 4 5 
}

1 2 3 4 5

3 Java[ | ]

Java array_unique() 문서를 참고하십시오.

Java

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import java.util.Arrays;
import java.util.stream.IntStream;
public class MyClass {
    public static void main(String args[]) {
        int[] arr = {1,4,5,4,4,3,2,1};
        int[] arr2 = IntStream.of(arr).distinct().toArray();
        System.out.println( Arrays.toString(arr2) ); // [1, 4, 5, 3, 2]
    }
}

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4 JavaScript[ | ]

자바스크립트 array_unique() 문서를 참고하십시오.

JavaScript

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let arr = [1,4,5,4,4,3,2,1];
let arr2 = arr.filter((value, index, self) => { return self.indexOf(value) === index; });
console.log(arr2); // [ 1, 4, 5, 3, 2 ]

▶	[1, 4, 5, 3, 2]

5 PHP[ | ]

PHP array_unique() 문서를 참고하십시오.

PHP

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$arr = [ 1,4,5,4,4,3,2,1 ];
$arr2 = array_unique( $arr );
print_r( $arr2 );

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PHP

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$arr = [ 'a'=>'hello', 'b'=>'world', 'c'=>'hello' ];
$arr2 = array_unique( $arr );
print_r( $arr2 );

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6 Python[ | ]

Python array_unique() 문서를 참고하십시오.

Python

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a = [ 1,4,5,4,4,3,2,1 ]
b = list(set(a))
print( b ) # [1, 2, 3, 4, 5]

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7 R[ | ]

R unique() 문서를 참고하십시오.

R

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a <- c(1,4,5,4,4,3,2,1) 
b <- unique(a)
b

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8 같이 보기[ | ]