oop - What is adding methods to a class instead of "properly" subclassing called? -


take simple example in :

>>> class a(object): ...     pass ... >>> def f(self): ...     print "f called" ... >>> a.f = f >>> = a() >>> a.f() f called

so in example, existing class a gets additional (instance) function f (though overriding existing ones works well). in real life of course happen e.g. in different modules. how procedure called?

not sure following you, if do, talking extension methods


-

Comments

Post a Comment

Popular posts from this blog

scala - 'wrong top statement declaration' when using slick in IntelliJ -

Image
i'm porting project scala 2.9 2.10, therefore have use slick instead of scalaquery. i'm using slick 2.1.0 since supports ms access. according this tutorial , upgrade guide changed robs object class , added val robs : why error message wrong top statement declaration , how rid of it? edit: i'm new scala... according this question seems can't put val outside of methods or classes, right? code above directly in packge. right approach slick then? should move code in class or trait? according this changed val robs = tablequery[robs] to object robs extends tablequery(new robs(_)) {} . no warnings or errors anymore. :)
Read more

c# - DevExpress.Wpf.Grid.InfiniteGridSizeException was unhandled -

Image
when using devexpress, see error: devexpress.wpf.grid.infinitegridsizeexception unhandled message="by default, infinite grid height not allowed since grid rows rendered , hence grid work slowly. fix issue, should place grid container give finite height grid, or should manually specify grid's height or maxheight. note can avoid exception setting gridcontrol.allowinfinitegridsize static property true, in case grid run slowly." the problem dxgrid has infinite height. to fix, set height non-infinite. snoop absolutely invaluable this: if "height" xaml element infinite (i.e. 0 or nan ), can set using one of following: option 1: height="{binding path=actualheight, relativesource={relativesource mode=findancestor, ancestortype=uielement}}" option 2: verticalalignment="stretch" option 3: height="auto" hint: use verticalalignment="stretch" if child of grid <rowdefinition height=...
Read more

Laravel Bind Multiple Class to One Contract in The Service Provider -

so trying have eccomerce site handle both paypal , stripe payments. however, not sure how done. this have. class billingprovider extends serviceprovider { /** * bootstrap application services. * * @return void */ public function boot() { // } /** * register application services. * * @return void */ public function register() { $this->app->bind('app\contracts\billinginterface','app\services\billing\paypalbilling'); } } this works fine if need paypal. however, need both paypal , stripe. any idea how can go implementing this? when typehint can either paypal or stripe. public function stripe(request $request, billinginterface $bill){// handle stripe payment.} public function paypal(request $request, billinginterface $bill){// handle paypal payment.} imho, there many ways it. first of all, take contextual binding of service ...
Read more