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How is a CRC32 checksum calculated?
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118
The polynomial for CRC32 is:
x32 + x26 + x23 + x22 + x16 + x12 + x11 + x10 + x8 + x7 + x5 ...
pyplot scatter plot marker size
...d the output they produce.
# doubling the width of markers
x = [0,2,4,6,8,10]
y = [0]*len(x)
s = [20*4**n for n in range(len(x))]
plt.scatter(x,y,s=s)
plt.show()
gives
Notice how the size increases very quickly. If instead we have
# doubling the area of markers
x = [0,2,4,6,8,10]
y = [0]*len(...
Calculate the date yesterday in JavaScript
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18 Answers
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Time complexity of Sieve of Eratosthenes algorithm
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118
Your n/2 + n/3 + n/5 + … n/97 is not O(n), because the number of terms is not constant. [Ed...
Extract every nth element of a vector
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163
a <- 1:120
b <- a[seq(1, length(a), 6)]
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C语言面试那些事儿──一道指针与数组问题 - c++1y / stl - 清泛IT社区,为创新赋能!
...下代码:
int main(int argc, char** argv)
{
int a[5] = {1,2,3,4,5};
int* ptr = (int*)(&a + 1);
printf("%d,%d\n", *(a+1), *(ptr-1));
return 0;
}这道题在很多所谓经典C语言面试题里是常见的不能再常见,你...
游戏中的算法与计算思维 04:第一张、第二张与匹配状态 · App Inventor 2 中文网
...签_标题
标签
Width=Fill parent;FontSize=24;TextColor=#183153;Text=记忆翻牌 · 第 4课
逐步搭建
增加第一、第二、已配对和步数变量,定义 0盖住/1翻开/2匹配。
Touched 只处理状态为 0 的牌;第一为...
游戏中的算法与计算思维 07:按难度保存最佳成绩 · App Inventor 2 中文网
... 先预测,再运行
四对 4 步 20 秒、六对 6 步 10 秒,谁更好?
先记下自己的答案,运行起始工程与完成工程比较;答案见文末。
开始实战
以上一课完成工程为起点,先导入并运行,再另存为本课...
How to round up a number in Javascript?
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316
/**
* @param num The number to round
* @param precision The number of decimal places to prese...
Extracting specific columns from a data frame
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10 Answers
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