Non - Decreasing Subsequences

function nonDescendingSubsequences(array){
    array = array.map(Number);
    let result = [array[0]];
    let biggestNum = [array[0]];

    for(let i = 1;i < array.length;i++){

        let currentNumber = array[i];

        if(currentNumber >= biggestNum){
            result.push(currentNumber);
            biggestNum = currentNumber;
        }
    }
    console.log(result.join(' '));
}

nonDescendingSubsequences([20,3,2,15,6,1]);