arrays - 在groovy中按字母顺序对字符串数组进行排序

Question

所以我一直在学习在 Groovy 中使用数组。我想知道如何按字母顺序对字符串数组进行排序。我的代码当前接受用户输入的字符串并按顺序和逆序打印它们:

System.in.withReader {
    def country = []
      print 'Enter your ten favorite countries:'
    for (i in 0..9)
        country << it.readLine()
        print 'Your ten favorite countries in order/n'
    println country            //prints the array out in the order in which it was entered
        print 'Your ten favorite countries in reverse'
    country.reverseEach { println it }     //reverses the order of the array

我该如何按字母顺序打印它们？

Answer 1

sort()是你的 friend 。

country.sort()将排序 country按字母顺序，变异 country正在进行中。 country.sort(false)将排序 country按字母顺序，返回排序后的列表。

def country = ['Ireland', 'Iceland', 'Hungary', 'Thailand']
assert country.sort() == ['Hungary', 'Iceland', 'Ireland', 'Thailand']
assert country == ['Hungary', 'Iceland', 'Ireland', 'Thailand']

country = ['Ireland', 'Iceland', 'Hungary', 'Thailand']
assert country.sort(false) == ['Hungary', 'Iceland', 'Ireland', 'Thailand']
assert country == ['Ireland', 'Iceland', 'Hungary', 'Thailand']