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html - When to use lt;p gt; vs. lt;br gt; - Stack Overflow 14 You want to use the <p> tag when you need to break up two streams of information into separate thoughts <p> Now is the time for all good men to come to the aid of their country < p> <p>The quick brown fox jumped over the lazy sleeping dog < p> The <br > tag is used as a forced line break within the text flow of the web page
c++ - What does (~0L) mean? - Stack Overflow I'm doing some X11 ctypes coding, I don't know C but need some help understanding this In the C code below (might be C++ im not sure) we see (~0L) what does that mean? In Javascript and Python ~0
html - When to use lt;span gt; instead lt;p gt;? - Stack Overflow The <p> tag is a p aragraph, and as such, it is a block element (as is, for instance, h1 and div), whereas span is an inline element (as, for instance, b and a) Block elements by default create some whitespace above and below themselves, and nothing can be aligned next to them, unless you set a float attribute to them Inline elements deal with spans of text inside a paragraph They typically
c - why is *pp [0] equal to **pp - Stack Overflow So pp [0] points to the address of p, which is 0x2000, and by dereferencing I would expect to get the contents of address 0x2000 That's were your reasoning strays, but understandably so In C, the right hand side of an assignment, or generally an evaluation of an lvalue (vulgo: variable), more precisely an lvalue-to-rvalue conversion, is already a dereferencing! For example, int i, j=0; i=j
假设检验中的P值怎样计算呢？ - 知乎 例如，接近 0 05 的 P 值只能提供关于无效假设的微弱证据，而一个相对大的 P 值也不构成支持无效假设的证据，因此，数据分析不应以计算出 P 值而告终，研究者还可以提供其他证据，包括置信区间、预测区间、Bayes 方法、似然比或 Bayes 因子、决策理论模型等。
xml - Regular expression \p {L} and \p {N} - Stack Overflow 282 \p{L} matches a single code point in the category "letter" \p{N} matches any kind of numeric character in any script Source: regular-expressions info If you're going to work with regular expressions a lot, I'd suggest bookmarking that site, it's very useful
Whats P=NP?, and why is it such a famous question? The question of whether P=NP is perhaps the most famous in all of Computer Science What does it mean? And why is it so interesting? Oh, and for extra credit, please post a proof of the statement's