binary_gap.js

function binaryGapFnc(N) {
    var binary = N.toString(2);
    var regex = /10+1/g
    var matches = binary.match(regex);
    
    if(!matches) { return 0; }
    
    var binaryGap = 0;
    for(var i = 0; i < matches.length; i++) {
        if (matches[i].length > binaryGap) {
            binaryGap = matches[i].length - 2; // We remove the two 1's
        }
    }
    
    return binaryGap;
}