Ruby China

瞎扯淡 Ruby 数学乘法 0.07 * 100 = 7.00000000001

nxbtch · March 05, 2015 · Last by ywjno replied at March 05, 2015 · 1794 hits

javascript 中也是这样

qinix #1 March 05, 2015

float 在用二进制保存浮点数时候会出现丢失精度

追求高精度的话使用 Decimal，底层用字符串存储

ywjno #2 March 05, 2015

遵循 IEEE 标准

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