Removes falsy values from an array.

Use Array.prototype.filter() to filter out falsy values (false, null, 0, "", undefined, and NaN).

代码片段

const compact = arr => arr.filter(Boolean);

使用样例

compact([0, 1, false, 2, '', 3, 'a', 'e' * 23, NaN, 's', 34]); // [ 1, 2, 3, 'a', 's', 34 ]