红宝石 |数组类 join()函数

join()是一个 Array 类方法，它返回通过将数组的每个元素转换为字符串创建的字符串，由给定的分隔符分隔。

Syntax: Array.join()
Parameter: Array 
separator
Return: join value of the array elements

示例 #1：

Ruby

# 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

示例 #2：

红宝石

# 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**