大约有 47,000 项符合查询结果(耗时:0.0655秒) [XML]

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How to vertically align an image inside a div

...ng" height=3px /> </div> Or, if you don't want to have an extra element in modern browsers and don't mind using Internet Explorer expressions, you can use a pseudo-element and add it to Internet Explorer using a convenient Expression, that runs only once per element, so there won't ...
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How do I get a raw, compiled SQL query from a SQLAlchemy expression?

...as the caveats that it is only supported for basic types, such as ints and strings, and furthermore if a bindparam() without a pre-set value is used directly, it won’t be able to stringify that either. The documentation also issues this warning: Never use this technique with string content r...
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How to Calculate Execution Time of a Code Snippet in C++

...without Boost (tested on macOS/iOS): #include <chrono> #include <string> #include <iostream> #include <math.h> #include <unistd.h> class NLTimerScoped { private: const std::chrono::steady_clock::time_point start; const std::string name; public: NLTimerSco...
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What to do with “Unexpected indent” in python?

... statement). All lines of code in a block must start with exactly the same string of whitespace. For instance: >>> def a(): ... print "foo" ... print "bar" IndentationError: unexpected indent This one is especially common when running python interactively: make sure you don't put a...
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How do I calculate the date in JavaScript three months prior to today?

...pet: var d = new Date("January 14, 2012"); console.log(d.toLocaleDateString()); d.setMonth(d.getMonth() - 3); console.log(d.toLocaleDateString()); There are some caveats... A month is a curious thing. How do you define 1 month? 30 days? Most people will say that one month ago me...
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Where does Scala look for implicits?

...something that does support m. A simple example would be the method map on String: "abc".map(_.toInt) String does not support the method map, but StringOps does, and there's an implicit conversion from String to StringOps available (see implicit def augmentString on Predef). Implicit Parameters ...
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Looping through localStorage in HTML5 and JavaScript

...u could store a JSON-serialized array: localStorage.setItem("words", JSON.stringify(["Lorem", "Ipsum", "Dolor"])); The draft spec claims that any object that supports structured clone can be a value. But this doesn't seem to be supported yet. EDIT: To load the array, add to it, then store: var...
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The server principal is not able to access the database under the current security context in SQL Se

...figured out I just had a stupid typo in the Database Name in my connection string connecting to Azure SQL Database. If your Database Name is correct, you don't need access to Master. If it's wrong, then (in my case) I think Entity Framework (6.1.3) is trying to be extra smart by connecting to Master...
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What is state-of-the-art for text rendering in OpenGL as of version 4.1? [closed]

...x Pulling (D. Rákos, "OpenGL Insights", pp. 239), there is no significant extra latency or overhead associated with pulling vertex data programmatically from the shader on the newest generations of GPUs, as compared to doing the same using the standard fixed function. Also, the latest generations o...
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What is the rationale for all comparisons returning false for IEEE754 NaN values?

...l compare unordered with everything, including itself. As far as writing extra code to handle NaNs goes, it is usually possible (though not always easy) to structure your code in such a way that NaNs fall through properly, but this is not always the case. When it isn't, some extra code may be nec...