https://www.codewars.com/kata/578553c3a1b8d5c40300037c
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DESCRIPTION:
Given an array of ones and zeroes, convert the equivalent binary value to an integer.
Eg: [0, 0, 0, 1] is treated as 0001 which is the binary representation of 1.
Examples:
Testing: [0, 0, 0, 1] ==> 1
Testing: [0, 0, 1, 0] ==> 2
Testing: [0, 1, 0, 1] ==> 5
Testing: [1, 0, 0, 1] ==> 9
Testing: [0, 0, 1, 0] ==> 2
Testing: [0, 1, 1, 0] ==> 6
Testing: [1, 1, 1, 1] ==> 15
Testing: [1, 0, 1, 1] ==> 11
However, the arrays can have varying lengths, not just limited to 4.
설명:
1과 0으로 이루어진 배열을 받아 동등한 이진수 값을 정수로 반환하세요.
예: [0, 0, 0, 1]은 1의 이진 표현인 0001로 취급됩니다.
예시:
Testing: [0, 0, 0, 1] ==> 1
Testing: [0, 0, 1, 0] ==> 2
Testing: [0, 1, 0, 1] ==> 5
Testing: [1, 0, 0, 1] ==> 9
Testing: [0, 0, 1, 0] ==> 2
Testing: [0, 1, 1, 0] ==> 6
Testing: [1, 1, 1, 1] ==> 15
Testing: [1, 0, 1, 1] ==> 11
그러나 배열의 길이는 4로 제한되지 않고 다양한 길이를 가질 수 있습니다.
풀이
배열을 문자열로 만들고 10진수로 바꿔서 반환해주었다.
코드
const binaryArrayToNumber = arr => {
return parseInt(arr.join(''), 2);
};
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