红宝石 |数组 <=>函数

红宝石 |数组 <=>函数

Array#() : ()是一个 Array 类方法，用于执行两个数组之间的比较。

Syntax: Array.()

Parameter: Array for the comparison

Return: 1 : if a > b
-1 : if a < b
0 : if a = b

示例 #1：

# Ruby code for <=>() method 
# checking equality 
     
# declaring arrays 
a = [18, 22, 33, 4, 5, 6] 
     
# declaring arrays 
b = [18, 22, 33, 4, 5, 6] 
     
# declaring arrays 
c = [18, 22, 33, 40, 50, 6] 
     
# <=> method
puts "<=> method : #{a <=> b}\n\n"
     
# <=> method 
puts "<=> method : #{a <=> c}\n\n"
     
# <=> method
puts "<=> method : #{b <=> c}\n\n"

输出 ：

method : 0

 method : -1

 method : -1

示例 #2：

# Ruby code for <=>() method 
# checking equality 
     
# declaring arrays 
a = ["abc", "xyz", "dog"] 
     
# declaring arrays 
b = ["cat", "cat", "dog"] 
     
# declaring arrays 
c = ["cat", "cat", "dog"] 
     
# <=> method
puts "<=> method : #{a <=> b}\n\n"
     
# <=> method
puts "<=> method : #{a <=> c}\n\n"
     
# <=> method
puts "<=> method : #{b <=> c}\n\n"

输出 ：

method : -1

 method : -1

 method : 0