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Is 1.0 a valid output from std::generate_canonical?
I always thought random numbers would lie between zero and one, without 1 , i.e. they are numbers from the half-open interval [0,1). The documention on cppreference.com of std::generate_canonical confirms this.
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What is the difference between UTF-8 and ISO-8859-1?
What is the difference between UTF-8 and ISO-8859-1 ?
8 Answers
8
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Get the cartesian product of a series of lists?
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13 Answers
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PHP DateTime::modify adding and subtracting months
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108
Why it's not a bug:
The current behavior is correct. The following happens internally:
+1 m...
Representing and solving a maze given an image
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10 Answers
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What is the most efficient way of finding all the factors of a number in Python?
...return set(reduce(list.__add__,
([i, n//i] for i in range(1, int(n**0.5) + 1) if n % i == 0)))
This will return all of the factors, very quickly, of a number n.
Why square root as the upper limit?
sqrt(x) * sqrt(x) = x. So if the two factors are the same, they're both the square...
App Inventor 2 传感器应用教程 - 位置/方向/加速度传感器 · App Inventor 2 中文网
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常见问题
Q1: LocationSensor获取不到位置？
Q2: 传感器数据抖动严重？
Q3: 传感器很耗电？
Q4: OrientationSensor方向角不准确？
总结
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概述
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手机当上位机：用二进制协议和设备收发数据 · App Inventor 2 中文网
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前面所有字节相加取低 8 位
数据的第 1 个字节是命令：
方向
数据
含义
App → 设备
01
读温湿度
设备 → App
81 + 温度（2 字节，乘 10，有符号，高字...