大约有 13,330 项符合查询结果(耗时:0.0140秒) [XML]

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How to make my custom type to work with “range-based for loops”?

...C++ standard, is specified to expand to something equivalent to: for( range_declaration : range_expression ) becomes: { auto && __range = range_expression ; for (auto __begin = begin_expr, __end = end_expr; __begin != __end; ++__begin) { range_declaration = *...
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How to remove illegal characters from path and filenames?

...blic string ReplaceInvalidChars(string filename) { return string.Join("_", filename.Split(Path.GetInvalidFileNameChars())); } This answer was on another thread by Ceres, I really like it neat and simple. share ...
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Representing graphs (data structure) in Python

... both ways). We'll handle that by adding a directed parameter to the Graph.__init__ method. We'll also add some other helpful methods. import pprint from collections import defaultdict class Graph(object): """ Graph data structure, undirected by default. """ def __init__(self, connection...
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Behaviour of increment and decrement operators in Python

...so far as they don't explain what happens. To be exact, +x evaluates to x.__pos__() and ++x to x.__pos__().__pos__(). I could imagine a VERY weird class structure (Children, don't do this at home!) like this: class ValueKeeper(object): def __init__(self, value): self.value = value def __s...
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How to deal with SettingWithCopyWarning in Pandas?

...H5390 and GH5597 for background discussion.] df[df['A'] > 2]['B'] = new_val # new_val not set in df The warning offers a suggestion to rewrite as follows: df.loc[df['A'] > 2, 'B'] = new_val However, this doesn't fit your usage, which is equivalent to: df = df[df['A'] > 2] df['B'] = ...
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Calling a function of a module by using its name (a string)

... Assuming module foo with method bar: import foo method_to_call = getattr(foo, 'bar') result = method_to_call() You could shorten lines 2 and 3 to: result = getattr(foo, 'bar')() if that makes more sense for your use case. You can use getattr in this fashion on class insta...
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error LNK2019: unresolved external symbol _WinMain@16 referenced in function ___tmainCRTStartup

...you can just hint at what your entry point is, because you haven't defined ___tmainCRTStartup. You can do this by adding the following to Properties -> Linker -> Command line: /ENTRY:"mainCRTStartup" This way you get rid of the console window. ...
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Pure JavaScript Send POST Data Without a Form

... socket, SocketServer, BaseHTTPServer import os, traceback, sys, json log_lock = threading.Lock() log_next_thread_id = 0 # Local log functiondef def Log(module, msg): with log_lock: thread = threading.current_thread().__name__ msg = "%s %s: %s" % (module, thread...
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Short description of the scoping rules?

...ithout explicit declaration, but writing to it without declaring global(var_name) will instead create a new local instance. – Peter Gibson Jun 27 '12 at 5:53 12 ...
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What is the formal difference in Scala between braces and parentheses, and when should they be used?

...e method expects a single parameter. For example: List(1, 2, 3).reduceLeft{_ + _} // valid, single Function2[Int,Int] parameter List{1, 2, 3}.reduceLeft(_ + _) // invalid, A* vararg parameter However, there’s more you need to know to better grasp these rules. Increased compile checking with pare...