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java-为什么JRuby不能识别BigNums而Ruby却不能识别BigNums?

作者:互联网

如果我输入这个大整数:

puts 9997836544.class.to_s

并使用ruby 1.86进行编译,它预期会报告:

BigNum

而JRuby(Netbeans中为1.1.4)令人惊讶地报告:

Fixnum

我以为Java有一个BigInteger类对应于Ruby中的BigNum类.如果是这样,我会期望JRuby和ruby产生相同的输出.

解决方法:

找到了这个JRuby bug report

It seems that JRuby and MRI have different limits to separate Fixnum and Bignum.

So, MRI uses 0x3fffffff as the biggest FixNum under 32bit environment.
And JRuby always uses 64bit value: jruby -e 'p (0x7fffffffffffffff + 1).class' —> Bignum.

因此,尝试更大的数字,您将获得预期的BigNum.

标签:bignum,jruby,ruby,ruby-on-rails,java
来源: https://codeday.me/bug/20191210/2103579.html