Apply array of filters

filterMany.js

/**
 * @param array of unary functions
 * @param array of any
 * @return array of any
 */
 filterMany = (f, d) => 
   f.length < 2 ? d.filter(f[0]) : filterMany(f, d.filter(f.shift()))



let xs = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20];

let gt10 = x => x > 10;
let isEven = x => x % 2 === 0;

filterMany([gt10, isEven], xs);
// -> [ 12, 14, 16, 18, 20 ]