大约有 5,550 项符合查询结果(耗时:0.0353秒) [XML]

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How to organize large R programs?

...the interpreter much more robust than before. There is no doubt that R is 100-300x slower than C, but usually the bottleneck is concentrated around a few lines of code, which can be delegated to C/C++. I think it would be a mistake to delegate the strengths of R in data manipulation and statistical...
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ggplot with 2 y axes on each side and different scales

...= "Productivity % of best", labels = function(b) { paste0(round(b * 100, 0), "%")})) + theme( axis.title.y = element_text(color = "grey"), axis.title.y.right = element_text(color = "blue")) Here's the result (above code + some color tweaking): The point (aside from using ...
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OOP vs Functional Programming vs Procedural [closed]

... String processing is awesomely done in perl (100x better than in Java, C++ or C#) yet the string functionality of the language is absolutely NOT object oriented. C's string handling was terrible, but then C is not the only procedural language (nor the best). ...
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Where is the WPF Numeric UpDown control?

...ss NumericUpDown : UserControl { int minvalue = 0, maxvalue = 100, startvalue = 10; public NumericUpDown() { InitializeComponent(); NUDTextBox.Text = startvalue.ToString(); } private void NUDButtonUP_Click(object sender, RoutedEventArgs e) { ...
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Comparing date part only without comparing time in JavaScript

... got a 100x speedup moving from a momentjs solution to a Date() + sethours solution. careful friends :-) – 2c2c Aug 11 '17 at 12:57 ...
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Why use double indirection? or Why use pointers to pointers?

...n 28 '13 at 20:29 bharat.chandak100 10311 silver badge1212 bronze badges answered Apr 7 '11 at 12:11 AshaAsha ...
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Why should I use an IDE? [closed]

... 100 Code completion. It helps a lot with exploring code. ...
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Join vs. sub-query

...reference to the upper query, especially when it comes to row-counts above 100,000. The thing seems to be memory usage and paging to the swap-file. A join would produce a very big amount of data, that may not fit into memory and must be paged into the swap-file. Whenever this is the case the query-t...
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Are tuples more efficient than lists in Python?

...lookups and unpacking: $ python3.6 -m timeit -s 'a = (10, 20, 30)' 'a[1]' 10000000 loops, best of 3: 0.0304 usec per loop $ python3.6 -m timeit -s 'a = [10, 20, 30]' 'a[1]' 10000000 loops, best of 3: 0.0309 usec per loop $ python3.6 -m timeit -s 'a = (10, 20, 30)' 'x, y, z = a' 10000000 loops, bes...
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How to think in data stores instead of databases?

...le Datastore instead of databases? It seems I've trained my mind to think 100% in object relationships that map directly to table structures, and now it's hard to see anything differently. I can understand some of the benefits of Google Datastore (e.g. performance and the ability to distribute dat...