简单的数值过滤器

function f(s, e) {
    var ret = [];
    for (var i in s) {
        ret.push(e(s[i]));
    }
    return ret;
}

Dome

var a = [-1, -1, 1, -3, -3, -3, 2, 2, -2, -2, 3, -1, -1];
var b = f(a, function(n) {
    return n > -0 ? n : 0;
});
console.log(b);

结果

[0, 0, 1, 0, 0, 0, 2, 2, 0, 0, 3, 0, 0]