红宝石 | BigDecimal <=> 值
BigDecimal#<=>() : <=>()是一个 BigDecimal 类方法,它比较两个 BigDecimal 值。
Syntax: BigDecimal.<=>()
Parameter: BigDecimal values
Return: 0 if a equals b; 1 if a > b; -1 if a < b
代码 #1:<=>() 方法的示例
# Ruby code for BigDecimal.<=>() method
# loading BigDecimal
require 'bigdecimal'
# declaring BigDecimal
a = 42.1**13
# declaring BigDecimal
b = -BigDecimal("10")
# declaring BigDecimal
c = -(22 ** 7.1) * 10
# a > b
puts "BigDecimal a <=> b : #{a<=>b}\n\n"
# b > c
puts "BigDecimal b <=> c : #{b<=>c}\n\n"
# c < a
puts "BigDecimal a <=> c : #{c<=>a}\n\n"
输出 :
BigDecimal a <=> b : 1
BigDecimal b <=> c : 1
BigDecimal a <=> c : -1
代码 #2:<=>() 方法的示例
# Ruby code for BigDecimal.<=>() method
# loading BigDecimal
require 'bigdecimal'
# declaring BigDecimal
a = 12**12 - 27
# declaring BigDecimal
b = BigDecimal('10')-(22 ** 7.1) ** 10
# declaring BigDecimal
c = BigDecimal('-3')
# a > b
puts "BigDecimal a <=> b : #{a<=>b}\n\n"
# b < c
puts "BigDecimal b <=> c : #{b<=>c}\n\n"
输出 :
BigDecimal a <=> b : 1
BigDecimal b <=> c : -1