红宝石 |数组 concat() 操作

Array#concat() : concat()是一个 Array 类方法，它在将两个数组附加在一起后返回数组。

Syntax:  Array.concat()

Parameter:  Arrays to be combined

Return:  Append the two arrays

代码 #1：concat() 方法的示例

# Ruby code for concat() method
# adding elements at the end
  
# declaring array
a = [18, 22, 33, nil, 5, 6]
  
# declaring array
b = [5, 4, nil, 1, 88, 9]
  
# declaring array
c = [18, 22, nil, 40, 50, 6]
  
# COMBINING TWO ARRAYS
puts "combining a and b : #{a.concat(b)}\n\n"
  
puts "combining c and b : #{b.concat(c)}\n\n"
  
puts "combining a and c : #{c.concat(a)}\n\n"

输出 ：

combining a and b : [18, 22, 33, nil, 5, 6, 5, 4, nil, 1, 88, 9]

combining c and b : [5, 4, nil, 1, 88, 9, 18, 22, nil, 40, 50, 6]

combining a and c : [18, 22, nil, 40, 50, 6, 18, 22, 33, nil, 5, 6, 5, 4, nil, 1, 88, 9]

代码 #2：concat() 方法的示例

# Ruby code for concat() method
# adding elements at the end
  
# declaring array
a = ["abc", "xyz", "dog"]
  
# declaring array
b = ["cow", "cat", "dog"]
  
# declaring array
c = ["cat", "1", "dog"]
  
# COMBINING TWO ARRAYS
puts "combining a and b : #{a.concat(b)}\n\n"
  
puts "combining c and b : #{b.concat(c)}\n\n"
  
puts "combining a and c : #{c.concat(a)}\n\n"

输出 ：

combining a and b : ["abc", "xyz", "dog", "cow", "cat", "dog"]

combining c and b : ["cow", "cat", "dog", "cat", "1", "dog"]

combining a and c : ["cat", "1", "dog", "abc", "xyz", "dog", "cow", "cat", "dog"]