Ruby 数组<=>函数
<=>是一个数组类的方法,它在两个数组之间进行比较。
语法。<=>
参数。用于比较的数组
返回。1 : 如果a > b
-1 : 如果a < b
0 : 如果a = b
例子 #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
例子 #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