Filter is good

Java

import org.apache.commons.collections.*;
CollectionUtils.filter(list, new Predicate() {
  public boolean evaluate(Object o) {
    return !((String)o).isEmpty();
  }
});

PHP

$list = array_filter($list, function($s) {return !empty($s);});

Python

l = [x for x in l if x]

JavaScript

l = _.filter(l, function(s){return s.length;});

憑著直覺寫的,如果不能動的話再說 XD
這種寫法通常好讀又簡單,不過有些語言要寫的囉嗦一點…