关键字 ORM active record

找 authy 客服问问

为什么不花五十吃顿饭然后花四百五去做个大宝剑呢？肚子的享受是很好满足的，精神满足是无止境的。你这么饕餮大餐的做法是向落后进化。

当然你完全可以请一个大宝剑上门服务，同时请一个厨师上门给你们做饭。你得开奔驰 住别墅 私人管家为你服务，甚至可以开始多人运动。如果你有这条件那么可以当我没说

一顿饭五百起，还不如去饭店吃了

Binary floating point math is like THIS. In most programming languages, it is based on the IEEE 754 standard.
所以，一切要从说起 IEEE 754 standard 说起、从二进制电脑如何模拟十进制运算说起

* Is floating point math broken?
https://stackoverflow.com/questions/588004/is-floating-point-math-broken

JavaScript treats decimals as floating point numbers, which means operations like addition might be subject to rounding error. You might want to take a look at this article: What Every Computer Scientist Should Know About Floating-Point Arithmetic

Just for information, ALL numeric types in javascript are IEEE-754 Doubles.

JavaScript uses the IEEE 754 standard for Math, it makes use of 64-bit floating numbers. This causes precision errors when doing floating point (decimal) calculations, in short, due to computers working in Base 2 while decimal is Base 10.

In most programming languages, it is based on the IEEE 754 standard.
Binary floating point math is like this. In most programming languages, it is based on the IEEE 754 standard.


P.S.
位数问题，math broken 情况，数字精度问题最终是位数问题

C# 是有通过专门的 decimal 数据类型作为值类型来解决这个问题的（），搜 C# do math float or decimal

https://stackoverflow.com/questions/753948/why-is-floating-point-arithmetic-in-c-sharp-imprecise

C# float only has 7 digit precision, and 99.999999f has 8 digits.
A single-precision IEEE-754 float will only be 32-bits, which gives around 7 decimal digits of precision. If you want better than that, use a double.

C# 是有通过专门的 decimal 数据类型作为值类型来解决这个问题的，搜 IEEE-754 vs C# decimal

https://stackoverflow.com/questions/9079225/decimal-type-in-c-sharp-vs-ieee-754-standard

C# decimal doesn't follow the same rules as IEEE 754 floating point numbers. The C# 4 specification is quite clear on how it should behave ... 别的语言应该有类似的库

关于 C# decimal 数据类型本身的弱点：
as far as I know, decimal is not compatible with anything - it's a Microsoft only invention - so you can't think of it in the same terms as normal floating point stuff. And it doesn't have subnormal values.

P.S.
你看到的控制台输出怪异结果（或者编程语言的怪异行为）是一个根据 IEEE-754 作浮点数运算的计算机语言如何处理浮点数的正确方式。别大惊小怪了

电影给我翅膀 Donne-moi des ailes (2019) ，科斯迪安总是如此的关心鸟类 ... 指引候鸟找到路线

ydys

拿能力换钱就是为了不拿尊严换钱

听音乐就好好听音乐，不要听人设
听人设才会有 “不断进步” “停滞不前”
听音乐是没有这些的。听音乐就是音符到音阶到乐曲，结束了

python 圈子还是有点意思的，一个个的

男女同住？

写代码 送外卖 开滴滴
最后大家一起开滴滴就可以了
殊途同归开滴滴

创业环境太差，作者处于劣势，不适合知识产权含量过高的创业

就好比 你看看周围的环境，你就可以听到和未来儿子的对话。

有时候可以听到和未来儿子的对话：“你好，不要把我生出来，谢谢”。

普通人的大脑认知
一个医生对一个病人说：康复期间不宜做剧烈运动
病人说：可以，但是我做康复就是为了在康复之后的时间里能做剧烈运动

论 996 信息是如何改变一个人的大脑认知的？

一个八小时生活八小时工作八小时睡觉的个体，在看歌剧踢球吃冰激凌的时候，是无法想到这种向落后进步的念头的