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抓住数据的小尾巴 - JS浮点数陷阱及解法 #59

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stupidehorizon opened this issue Jan 18, 2019 · 0 comments
Open

抓住数据的小尾巴 - JS浮点数陷阱及解法 #59

stupidehorizon opened this issue Jan 18, 2019 · 0 comments

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@stupidehorizon
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众所周知，JavaScript 浮点数运算时经常遇到会 0.000000001 和 0.999999999 这样奇怪的结果，如 0.1+0.2=0.30000000000000004、1-0.9=0.09999999999999998，很多人知道这是浮点数误差问题，但具体就说不清楚了。本文帮你理清这背后的原理以及解决方案，还会向你解释JS中的大数危机和四则运算中会遇到的坑。

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