大约有 15,000 项符合查询结果(耗时:0.0187秒) [XML]

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Can C++ code be valid in both C++03 and C++11 but do different things?

...o both the C++03 standard and the C++11 standard, but do different things depending on under which standard it is being compiled? ...
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how does multiplication differ for NumPy Matrix vs Array classes?

The numpy docs recommend using array instead of matrix for working with matrices. However, unlike octave (which I was using till recently), * doesn't perform matrix multiplication, you need to use the function matrixmultipy(). I feel this makes the code very unreadable. ...
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Disposing WPF User Controls

...disposable, and I would like to ensure that its dispose method will always get called once the containing window/application is closed. However, UserControl is not disposable. I tried implementing the IDisposable interface and subscribing to the Unloaded event but neither get called when the host ap...
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How to switch position of two items in a Python list?

I haven’t been able to find a good solution for this problem on the net (probably because switch, position, list and Python are all such overloaded words). ...
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Using i and j as variables in Matlab

i and j are very popular variable names (see e.g., this question and this one ). 9 Answers ...
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What are the differences between “=” and “

What are the differences between the assignment operators = and <- in R? 7 Answers ...
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Why doesn't indexOf work on an array IE8?

...function for Array, to define the exact spec version, run this before trying to use it: if (!Array.prototype.indexOf) { Array.prototype.indexOf = function(elt /*, from*/) { var len = this.length >>> 0; var from = Number(arguments[1]) || 0; from = (from < 0) ? M...
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Why does the JVM still not support tail-call optimization?

... Diagnosing Java Code: Improving the Performance of Your Java Code (alt) explains why the JVM does not support tail-call optimization. But although it is well known how to automatically transform a tail-recursive function in...
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What is the meaning of the 'g' flag in regular expressions?

What is the meaning of the g flag in regular expressions? 9 Answers 9 ...
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Force line-buffering of stdout when piping to tee

Usually, stdout is line-buffered. In other words, as long as your printf argument ends with a newline, you can expect the line to be printed instantly. This does not appear to hold when using a pipe to redirect to tee . ...