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Ruby Array class join()用法及代码示例


join()是一个Array类方法,该方法返回通过将数组的每个元素转换为由给定分隔符分隔的字符串而创建的字符串。

用法:Array.join()

参数:数组
分隔符


返回:数组元素的连接值

范例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

范例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**



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