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拉里佩奇23条箴言帮你度过创业低谷 - 资讯 - 清泛网 - 专注C/C++及内核技术
...们超越自己以至于去改变世界。
4。“大部分公司都不能永久地成功下去。他们犯了什么根本性错误么？他们通常没有把握好未来。”
不要让现实限制了自己的可能性。专注于你现在力所能及的事情上是现实的。
但是要给自...
一文讲透区块链技术原理 - 资讯 - 清泛网 - 专注C/C++及内核技术
...块（block）：在区块链技术中，数据以电子记录的形式被永久储存下来，存放这些电子记录的文件我们就称之为“区块（block）”。区块是按时间顺序一个一个先后生成的，每一个区块记录下它在被创建期间发生的所有价值交换...
How does this giant regex work?
...Cs+Tr0b/FiKnKHbnQQDFz7S0Bjh0FBfiX9LAy9yYHLpyu6PDOBMKs80DmAA9RcDhAU4eCrLwZBq2T41K1K80x8PvLCsJRCqfCxUE1E/zoZ6mdA2OGX4Th9Y8+ICp8gN+KVAiPNLy2EFmGAxfD0HUN+dlilpvXEJ0yGzN2ze3IisRu+ywwwSEcTxPQdmODXZYz9bb70oZi+90O3HQXhrsXaHWdAMVpVPjo+sA286YB7O9LXZeAZPrD8PQxgEDMEkPNuI2MaCbfQS0BSKH/vBdOiNflwNiw6dIDodBwvmQEdfu...
What is pseudopolynomial time? How does it differ from polynomial time?
...ke this:
100010101010111
The runtime will now (in the worst case) be 2T. I can double the amount of work the algorithm does just by adding one more bit!
An algorithm runs in pseudopolynomial time if the runtime is some polynomial in the numeric value of the input, rather than in the number of...
What is an intuitive explanation of the Expectation Maximization technique? [closed]
...5H,5T
# 2nd: Coin A, {HHHHTHHHHH}, 9H,1T
# 3rd: Coin A, {HTHHHHHTHH}, 8H,2T
# 4th: Coin B, {HTHTTTHHTT}, 4H,6T
# 5th: Coin A, {THHHTHHHTH}, 7H,3T
# so, from MLE: pA(heads) = 0.80 and pB(heads)=0.45
# represent the experiments
head_counts = np.array([5,9,8,4,7])
tail_counts = 10-head_counts
expe...
Get MIME type from filename extension
... "application/x-msmediaview"},
{".m1v", "video/mpeg"},
{".m2t", "video/vnd.dlna.mpeg-tts"},
{".m2ts", "video/vnd.dlna.mpeg-tts"},
{".m2v", "video/mpeg"},
{".m3u", "audio/x-mpegurl"},
{".m3u8", "audio/x-mpegurl"},
{".m4a", "audio/m4a"},
...
Android应用开发性能优化完全分析 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ap内部结构就是一个哈希表的拉链结构。HashMap默认实现的扩容是以2倍增加，且获取一个节点采用了遍历法，所以相对来说无论从内存消耗还是节点查找上都是十分昂贵的。
SparseArray：
SparseArray比HashMap省内存是因为它避免了对Ke...