Javascript/jQuery : remove all non-numeric values from array

Question

对于数组:["5","something","","83","text",""]

如何从数组中删除所有非数字和空值？期望的输出:["5","83"]

Answer 1

使用array.filter()和一个回调函数 checks if a value is numeric :

var arr2 = arr.filter(function(el) {
    return el.length && el==+el;
//  more comprehensive: return !isNaN(parseFloat(el)) && isFinite(el);
});

array.filter has a polyfill适用于 IE8 等较旧的浏览器。