大约有 48,000 项符合查询结果(耗时:0.0602秒) [XML]

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Is there a way to pass optional parameters to a function?

... def my_func(mandatory_arg, optional_arg=100): print(mandatory_arg, optional_arg) http://docs.python.org/2/tutorial/controlflow.html#default-argument-values I find this more readable than using **kwargs. To determine if an argument was passed at all, I use a...
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How to detect my browser version and operating system using JavaScript?

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Converting datetime.date to UTC timestamp in Python

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How to check if command line tools is installed

I have a macbook pro with OS X 10.8.2. XCode is installed. I know this as it appears in the Applications directory. There are also the xcodebuild and xcode-select files in /usr/bin I need to know if the command line tools is installed. Is there a command for it? What can I do to see if XCode CLT is ...
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Boolean operators && and ||

...he reason for preferring one. A word of warning though, make sure you are 100% sure they can only be length one. You can get really goofy bugs otherwise. – Aaron left Stack Overflow Jul 2 '11 at 19:28 ...
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One line if statement not working

... answered Sep 30 '10 at 5:01 Nikita RybakNikita Rybak 63.3k2121 gold badges147147 silver badges170170 bronze badges ...
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Why is === faster than == in PHP?

... answered Mar 8 '10 at 13:16 meder omuralievmeder omuraliev 166k6262 gold badges359359 silver badges420420 bronze badges ...
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Modifying a query string without reloading the page

...your browser – Zhenya May 24 '17 at 10:49 4 in modern browsers you can just do: if (window.histor...
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How to initialise memory with new operator in C++?

...ut it actually has special syntax for value-initializing an array: new int[10](); Note that you must use the empty parentheses — you cannot, for example, use (0) or anything else (which is why this is only useful for value initialization). This is explicitly permitted by ISO C++03 5.3.4[expr.new]...
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Detect if homebrew package is installed

...tHolger Just 43.4k1414 gold badges9494 silver badges109109 bronze badges 6 ...