method-chaining

问题 After reading this question, I've started to think about generic methods in Java 8 . Specifically, what happens with generic type parameters when methods are chained. For this question, I will use some generic methods from Guava's ImmutableMap , but my question is more general and can be applied to all chained generic methods. Consider ImmutableMap.of generic method, which has this signature: public static <K, V> ImmutableMap<K, V> of(K k1, V v1) If we use this generic method to declare a Map

问题 What are the benefits (or drawbacks) of returning a reference to 'this' object in a method that modifies itself? When should returning a 'this' be used as apposed to void? When looking at an answer on code review stack exchange, I noticed that the answer used a 'return this' in a self operating method. Simplified class from original: class Item { public Item(string name) { Name = name; } public string Name { get; private set; } public Item AddComponent(ItemComponent component) { _components

问题 I want to do the following: pattern = cl().a().b("test").c() where cl is a class and a, b, c are class methods. After that I need to call pattern.to_string and it should output a string that was formed. Each method returns a string. Now how can I achieve the above? Append the method output to a list? What about the chainable function? If I wrote the class the normal way, the above won't work. Thank. 回答1: Return the class instance at the end of each method and store the intermediate results in

问题 There is an existing C API that looks like this: //data typedef struct {int properties;} Widget; //interface Widget* SetWidth(Widget *const w, int width){ // ... return w; } Widget* SetHeight(Widget *const w, int height){ // ... return w; } Widget* SetTitle(Widget *const w, char* title){ // ... return w; } Widget* SetPosition(Widget *const w, int x, int y){ // ... return w; } The first parameter is always a pointer to the instance, and the functions that transform the instance always return

来源： https://stackoverflow.com/questions/50429649/how-to-wait-for-a-jquery-toggle-to-finish-before-running-another-function

来源： https://stackoverflow.com/questions/50429649/how-to-wait-for-a-jquery-toggle-to-finish-before-running-another-function

问题 Tl;Dr. Is a good practice chaining getValues() to Class Sheet getActiveRange() ? What could cause that sometimes returns [[]] instead of the expected values? NOTE: [[]] is what is being displayed in the Log / Script executions page. These "things" doesn't show quotation characters for strings. This is derived from Get selected values in row where I posted an answer with a couple of alternatives to get the values of the active range. Here I'm specifically asking for the reasons of the randomly

问题 The pandas.DataFrame.query() method is of great usage for (pre/post)-filtering data when loading or plotting. It comes particularly handy for method chaining. I find myself often wanting to apply the same logic to a pandas.Series , e.g. after having done a method such as df.value_counts which returns a pandas.Series . Example Lets assume there is a huge table with the columns Player, Game, Points and I want to plot a histogram of the players with more than 14 times 3 points. I first have to

问题 The pandas.DataFrame.query() method is of great usage for (pre/post)-filtering data when loading or plotting. It comes particularly handy for method chaining. I find myself often wanting to apply the same logic to a pandas.Series , e.g. after having done a method such as df.value_counts which returns a pandas.Series . Example Lets assume there is a huge table with the columns Player, Game, Points and I want to plot a histogram of the players with more than 14 times 3 points. I first have to

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 4 years ago . I want to know what is the name of the design pattern behind method chaining in jQuery? 回答1: According to this post https://softwareengineering.stackexchange.com/questions/137999/what-is-the-pattern-name-for-using-method-chaining-to-build-an-object, it's called a Fluent Interface