cosine_similarity.js

function cosinesim(A,B){
    var dotproduct=0;
    var mA=0;
    var mB=0;
    for(i = 0; i < A.length; i++){ 
        dotproduct += (A[i] * B[i]);
        mA += (A[i]*A[i]);
        mB += (B[i]*B[i]);
    }
    mA = Math.sqrt(mA);
    mB = Math.sqrt(mB);
    var similarity = (dotproduct)/((mA)*(mB)) 
    
    return similarity;
}


var array1 = [1,1,0,0,0,0,0,0,0,0];
var array2 = [1,0,1,1,1,1,1,1,1,1];

var p = cosinesim(array1,array2);

console.log(p);