Ruby 数组类的join()函数
join() 是一个数组类的方法,它返回字符串,该字符串是通过将数组中的每个元素转换为字符串,并由给定的分隔符分隔而形成的。
语法: Array.join()
返回: 数组元素的连接值
例子#1:
# Ruby code for join() method
# declaring array
a = [18, 22, 33, nil, 5, 6]
# declaring array
b = [1, 4, 1, 1, 88, 9]
# declaring array
c = [18, 22, nil, nil, 50, 6]
# join
puts "join : #{a.join("4")}\n\n"
# join
puts "join : #{b.join('-')}\n\n"
# join
puts "join : #{c.join("*")}\n\n"
输出 :
join : 1842243344546
join : 1-4-1-1-88-9
join : 18*22***50*6
例子2:
# Ruby code for join() method
# declaring array
a = ["abc", "nil", "dog"]
# declaring array
b = ["cow", nil, "dog"]
# declaring array
c = ["cat", nil, nil]
# join
puts "join : #{a.join("4")}\n\n"
# join
puts "join : #{b.join('-')}\n\n"
# join
puts "join : #{c.join("*")}\n\n"
输出 :
join : abc4nil4dog
join : cow--dog
join : cat**