mixins

问题 I'm reading the LESS official documentation (version 1.5) but I cannot understand how to import a reference to another CSS in order to use its content in my own file. For example: mystyle.less @import (reference) "bootstrap.min.css"; .mylabel { .label-success; } It shows this error: NameError: .label-success is undefined Perhaps I misunderstand the documentation? 回答1: You can only use reference with other LESS files. You cannot mix and match LESS and CSS files with that method. If you need to

问题 I am trying to write a mixin for able to save a form partially and resume later. This is useful when the form is long and user cannot finish in one-sitting. The mixin code below comes directly from prodjango book by Marty Alchin. I have commented in the code where the error comes which is the POST method in mixin. Detailed error description below. From the traceback, I think the error comes from these two calls self.get_form(form_class) and get_form_kwargs . but I have no idea how to fix this

问题 Here's what I want to write: val alg10 = new GeneticAlgorithm[FlatDesign] with PhenotypeSize(10) with FlatDesignMutator with ChildrenReplaceParents(numChildren=2) with TargetFitnessFunction(targetPhenotype) with PopulationSize(40) with RunLength(numGenerations=100) In other words, there are lots of constraints and parameters I'd like to set. For example, PhenotypeSize(10) has implications for the mutator and the fitness function. Abstract types ought to make it easy to implement/enforce all

问题 I have this little mixin set up: .linear-gradient(@direction:top, @color1:#fff, @color2:#000) { background-image: -webkit-linear-gradient(@direction, @color1, @color2); } Then, in my main.less I'm trying something like this: a { .linear-gradient(top, #999, #666); } That works fine, by say I want to do something like this: a { .linear-gradient(top, , #666); } Now, the first color should default to its default mixin color. How do I do this? Is this even possible 回答1: Less isn't quite that

问题 I have a Mix-in that reflects on the receiver class to generate some code. This means that I need to execute the class method at the end of the class definition, like in this trivially dumbed down example: module PrintMethods module ClassMethods def print_methods puts instance_methods end end def self.included(receiver) receiver.extend ClassMethods end end class Tester include PrintMethods def method_that_needs_to_print end print_methods end I'd like to have the mixin do this for me

问题 I have a mixin that creates a gradient with vendors' prefixes, and I would like to add this background to a DIV in addition to another background-image . .horizontal(@start-color: #555; @end-color: #333; @start-percent: 0%; @end-percent: 100%) { background:@start-color; background-image: -webkit-linear-gradient(left, @start-color @start-percent, @end-color @end-percent); background-image: -o-linear-gradient(left, @start-color @start-percent, @end-color @end-percent); background-image+: linear

问题 I'm having issues trying to add a mixin with a metaclass to a class whose base is a QWidget. I'm aware that PyQt5 supports cooperative multiple inheritance and if my MixIn class has no metaclass then things work fine. However, if it has a metaclass - whether it be the pyqtWrapperType metaclass shared by QWidgets or a derived metaclass, then I receive the following error: Process finished with exit code -1073741819 (0xC0000005) The code for the rest of the script runs, but the QWidget does not

问题 I created a mixin for my class. The mixin itself works fine, it's not the issue that most people have where they mix faterxml/codehaus annotations. I tested it in a unit test, creating the ObjectMapper "by hand" while using the addMixIn method - it worked just fine. I want to use that mixin to modify the response jsons returned from my REST endpoints. I've tried to customize Spring Boot's ObjectMapper in many different ways: BuilderCustomizer: @Bean public

问题 How do you call a mixin dynamically? A use case might be to generate a style guide: // The mixin which should be called .typography-xs(){ font-family: Arial; font-size: 16px; line-height: 22px; } // The mixin which tries to call typography-xs .typography-demo(@typographyName, @mixinName) { @{typographyName} { &:before{content: '@{typographyName}';} // Calling the mixin dynamically @mixinName(); } } // Example call of .typograhpy-demo .typography-demo(xs, typography-xs); Is such a dynamic call

问题 Recently, I came across two articles on mixins. That got me confused between which one is better than other. First one from mdn var calculatorMixin = Base => class extends Base { calc() { } }; var randomizerMixin = Base => class extends Base { randomize() { } }; class Foo { } class Bar extends calculatorMixin(randomizerMixin(Foo)) { } Second one from https://javascript.info/mixins let sayMixin = { say(phrase) { alert(phrase); } }; let sayHiMixin = { __proto__: sayMixin, // (or we could use