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Wrapping templated objects elegantly in Cython

由 守給你的承諾、 提交于 2019-12-08 01:55:07
问题 This is similar to this question, but it never got any solutions, and I have at least a workaround for the problem, as inelegant as it is. I am trying to wrap a templated class, Point<_T,__Scale> , where _T=int,float... and __Scale is an int. Now the compiler will generate a separate class for each template value used, but the classes are not related in any way. However, the classes share all their methods, mostly operator overloads for !=<>*&/| , and getters. In Cython, the only way I have

Break out of scope

由 允我心安 提交于 2019-12-08 01:39:16
问题 Ideally, I would like to do this : @w: 4px; @media (max-width:900px) { @r: 3px; } @media (min-width:900px) { @r: 5px; } .myclass { border-radius: @w + @r; } This doesn't compile because @r isn't defined in the scope where I define .myclass . The obvious solutions are either to define .myclass inside the @media blocs or to copy the @media queries inside the definition of .myclass . But as soon as you use @r in many classes, both solutions are messy and involve many duplications. Is there a

What language mechanisms does Lilypond have for simple abbreviations, to avoid code duplication?

由 非 Y 不嫁゛ 提交于 2019-12-08 01:33:14
问题 In lilypond, I often find myself writing things like this \version "2.14.2" { r2 c2 | gis'8 gis gis gis gis gis gis gis | } or this \version "2.14.2" { \time 3/4 \clef bass \relative es, { <es \parenthesize es'>8\staccato g bes <es, \parenthesize es'>8\staccato g c } } where I repeatedly double some note one octave higher, parenthesized. I have scoured the Lilypond documentation, but have not found easy mechanisms to avoid this duplication. A more complex way is apparently to write a music

Meteor's Iron Router - Route multiple paths to one template but still DRY

由 本秂侑毒 提交于 2019-12-07 18:41:25
问题 I want to route multiple paths to the same template. For example, /abc/home and /home will both show the home template. The paths can also have subpaths, so abc/parent/child and /parent/child should route to same path also. I can simply repeat : Router.route('/home', function () { this.render('home'); Session.set('menu', 'home'); }); Router.route('/abc/home', function () { this.render('home'); Session.set('menu', 'home'); }); But I don't want to repeat it. If I want to change the template to

How to achieve this functionality using Generics?

由 |▌冷眼眸甩不掉的悲伤 提交于 2019-12-07 14:44:34
问题 I am not experienced in using .Net generics. I am designing a software system for and Investment Holding Company in .Net 4.0. The company has Retail business and IntellectualRights business. BookShop and AudioCDShop are examples of Retail business. EngineDesignPatent and BenzolMedicinePatent are examples of IntellectualRights business. These two business types are totally unrelated. The investment company has a concept called InvestmentReturn. It is the profit gained from each business. For

How to avoid writing repetitive code for different numeric types in .NET

由 假装没事ソ 提交于 2019-12-07 12:04:07
问题 I am trying to write generic Vector2 type which would suite float, double, etc. types and use arithmetical operations. Is there any chance to do it in C#, F#, Nemerle or any other more or less mature .NET language? I need a solution with (1)good performance (same as I would have writing separate Vector2Float, Vector2Double, etc. classes), (2)which would allow code to look nice (I do not want to emit code for each class in run-time) (3)and which would do as much compile time checking as

How do you “not repeat yourself” when giving a class an accessible “name” in C++?

由 烈酒焚心 提交于 2019-12-07 01:16:47
问题 Consider the following: class Base { public: virtual std::string getName() = 0; ... }; class Derived1 : public Base { public: static std::string getClassName() { return("Derived1"); } std::string getName() { return("Derived1"); } ... }; class Derived2 : public Base { public: static std::string getClassName() { return("Derived2"); } std::string getName() { return("Derived2"); } ... }; The idea is that if you have the derived class passed as, say, a template parameter, then you can get its

How to minify my repeating text equals and replacewith code

由 为君一笑 提交于 2019-12-06 14:14:09
How do I minify my jQuery code as it's very repetitive and I'm sure doesn't need to be so long. The code does exactly what I need it to do, I just need to minify to keep it looking clean and use less lines of code. Any guidance is greatly appreciated and helps with my learning. I came up with this code to answer my previous question . So I am learning thanks to the people on this site. I just need a little nudge in the right direction now and then. :-) $('#hidden-shoe-sizes').contents().prependTo('.swatches-select'); var sizefour = $('[data-value="4"] span').text(); $('.swatch-disabled .basel

How to loop chained calls elegantly in JavaScript/CoffeeScript?

由 为君一笑 提交于 2019-12-06 14:11:17
问题 I'm using Soda to write Selenium tests in Node.js and I have a situation where I have to press the down key several times. The code currently looks like this: browser .chain .setSpeed(200) .session() .open('/') .click("id=save") .focus(editor) .keyDown(editor, '\\40') .keyDown(editor, '\\40') .keyDown(editor, '\\40') .keyDown(editor, '\\40') .keyDown(editor, '\\40') .keyDown(editor, '\\40') .keyDown(editor, '\\40') .keyDown(editor, '\\40') .keyDown(editor, '\\40') .keyDown(editor, '\\40') ...

CQRS code duplication in commands

由 醉酒当歌 提交于 2019-12-06 12:30:31
I have a question about code duplication in the command side of the CQRS principle. Been following the articles from: https://www.cuttingedge.it/blogs/steven/pivot/entry.php?id=91 https://www.cuttingedge.it/blogs/steven/pivot/entry.php?id=92 It seems to me that this approach of separating each command in it's own class is going to give some code duplication when retrieving the entities from the data store. A bit contrived perhaps but let's say for example I have a command where I want to reset a users password given his email-address and a command where I want to update the user's last login
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