convert string array to integer array

I have created an array:

var endFlowArray = new Array;
for (var endIndex in flowEnd) { // <- this is just some numbers 
    for (var i in dateflow) { // <- same thing 
        var check = $.inArray(flowEnd[endIndex], dateflow[i]);
        if (check >= 0) {
            endFlowArray.push(i);
            flowEnd[endIndex] = null;
        }
    }
}

How can I convert a string array of:

["286", "712", "1058"]

to integer array like:

[286, 712, 1058]