大约有 42,000 项符合查询结果(耗时:0.0259秒) [XML]

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What are the advantages of NumPy over regular Python lists?

... (4 for type pointer, 4 for reference count, 4 for value -- and the memory allocators rounds up to 16). A NumPy array is an array of uniform values -- single-precision numbers takes 4 bytes each, double-precision ones, 8 bytes. Less flexible, but you pay substantially for the flexibility of standard...
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How to list all installed packages and their versions in Python?

... on windows. On linux it throws error: -bash: syntax error near unexpected token `(' – AjayKumarBasuthkar Mar 11 '16 at 15:24 ...
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Multi-line tooltips in Java?

... Use HTML tooltips and manually break your lines (a simple word tokenizer with a fixed line length should do it). Just make sure your tooltop text starts with "<HTML>". Break lines with "<BR/>" or "<P>". I realize it's not the most clean solution and Java's HTML support ...
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Create a pointer to two-dimensional array

... @litb, i'm sorry but this is wrong as your solution does not provide any allocation of storage for the array. – Rob Wells Jun 27 '09 at 18:11 2 ...
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What is the difference between AF_INET and PF_INET in socket programming?

...n pages, when i type man bind(2) or man bind() , terminal gives unexpected token '(' error whereas man bind gives explanation of bind in bash builtins. How to get man page for bind() . i mean bind() function ? – SP Sandhu Jul 18 '11 at 7:31 ...
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Cookie overflow in rails application?

...you're actually putting in cookies. If you need more than a couple of auth tokens, session ID's, and maybe a few layout/tracking cookies, you're living in the 90's. share | improve this answer ...
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The difference between fork(), vfork(), exec() and clone()

...rk() system call does not include the creation of a new address space (the allocation and setting up of new page directories). clone() - creates a new child process. Various parameters of this system call, specify which parts of the parent process must be copied into the child process and which part...
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What is meant by immutable?

...ing* in, unsigned int begin, unsigned int end) { struct String* out = malloc(sizeof(struct String)); out->characters = in->characters + begin; out->length = end - begin; return out; } Note that none of the characters have to be copied! If the String object were mutable (t...
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Automatic TOC in github-flavoured-markdown

...e) \[ *((?:(?![ .:#!\?;]*\])[^#])*)[ #:!\?;]*\] [\1] Then (convert last tokens lowercase and dash instead of spaces) \]([^ \r\n]*) ([^\r\n ]*) ]\L\1-\2 Remove unused final pounds and initial dashes: (?:()[-:;!\?#]+$|(\]#)-) \1\2 Remove useless chars in links: (\].*?)(?:\(|\)) \1 And fina...
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What's the fastest way to do a bulk insert into Postgres?

...end it arbitrarily, until you hit the maximum number of prepared statement tokens (it might be $999, but I'm not 100% sure about that). Sometimes one cannot use COPY, and this is a worthy replacement for those situations. sh...