filter()
方法创建一个新数组, 其包含通过所提供函数实现的测试的所有元素。
语法:var new_array = arr.filter(
callback(element[, index[, array]])[, thisArg])
1 var words = ['spray', 'limit', 'elite', 'exuberant', 'destruction', 'present']; 2 3 const result = words.filter(word => word.length > 6); 4 5 console.log(result); 6 // expected output: Array ["exuberant", "destruction", "present"]