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Ones and Zeros
Ones and Zeros
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
.
const binaryArrayToNumber = arr => parseInt(arr.join(''), 2);
const binaryArrayToNumber = arr => {
// your code
return arr.reduce((acc,cur,index)=>{
return acc + cur*Math.pow(2, arr.length-1-index)
},0)
};