数组怎么返回符合条件的元素

Question

比如["1","","","",""]我想得到数组里不为""的元素，即返回结果为"1"

Answer 1

var items = ["1","","","",""]

var filtered_items = items.filter(item => item !== '')

console.log(filtered_items)

Answer 2

["1","","","",""].filter(v=>v!="")

Answer 3

filter了解一下。