kdb - Q 中的模量行为

Question

为什么会这样

    -4.5 mod 2.3
0.1

按照 Q4Mortals 中的定义:

For a positive divisor, the remainder is defined as the difference between the dividend and the largest integral multiple of the divisor not exceeding the absolute value of the dividend.

2.3是不超过abs -4.5的最大整数倍。取差，-4.5 - 2.3 = -6.8

如果这个定义是错误的(看起来是这样)，那么正确的定义是什么？

Answer 1

认为应该只是

For a positive divisor, the remainder is defined as the difference between the dividend and the largest integral multiple of the divisor not exceeding the dividend.