为什么console.log（10150141932135203）在Firefox和Chrome中打印10150141932135204以及如何处理像这样的大整数值？
[英]Why does console.log(10150141932135203) print 10150141932135204 in both Firefox and Chrome and how to I deal with large integer values like these?
问题描述
I was trying to figure out why one of our clients on Facebook was having issues and I traced it to the number 10150141932135203 turning into 10150141932135204 giving us rather unexpected results. 
我试图找出为什么我们在Facebook上的一个客户遇到问题，我追溯到10150141932135203转向10150141932135204，给我们带来了意想不到的结果。
$ node
> 10150141932135203
10150141932135204
> 10150141932135204
10150141932135204
> 10150141932135205
10150141932135204
> 10150141932135206
10150141932135206
> 10150141932135207
10150141932135208
> 10150141932135208
10150141932135208
> 10150141932135209
10150141932135208
> 10150141932135210
10150141932135210
How can I deal with integer numbers of this size? 我怎样才能处理这个大小的整数？
1 个解决方案
解决方案1
4 已采纳 2012-03-06 07:06:16
If the numbers are bigger than what the IEEE 754 spec allows (2 53 ), they will lose precision as your examples demonstrate. 如果数字大于IEEE 754规范允许的数字（2 53 ），那么它们将失去精确度，如您的示例所示。
You could use a Binary Coded Decimal library for JavaScript, eg BCMathJs . 您可以为JavaScript使用二进制编码的十进制库，例如BCMathJs 。
This, of course, is only applicable if you need to perform arithmetic on the numbers. 当然，这只适用于需要对数字进行算术运算的情况。 If not, keep them as strings. 如果没有，请将它们保留为字符串。
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