getter-setter

Question regarding using only setters and variables correctly

孤街浪徒 提交于 2019-12-02 14:05:00
问题 I am having an issue with my current programming assignment. I feel as though I am very close to having it correct, but something is off. I know that I have to do something different in order to make the program function correctly, as it doesn't work right now, but I am not sure what it is. I am struggling specifically with how to use a single private variable to make both kinds of temperatures. Here is the assignment: Make a Temperature class. The class should have a function for setting the

How to use a function containing scanf() in the main function in C

不问归期 提交于 2019-12-02 14:01:17
The title describes what I'm trying to do, but I'm getting the error message that I never declared base1. I actually know this, but I'm not exactly sure how to actually fix the problem. int getBase1(void); int setBase1(double); int main(void){ getBase1(); setBase1(base1); } int getBase1(void){ printf("Please enter the length of a base: "); return; } int setBase1(double base1){ scanf("%lf", &base1); } You must use pointer, otherwise the variable inside the method will not point to the same memory adress. Using pointer you'll be putting the value inside the memory address of the variable that

Is there Object.watch for all properties / a shim for __noSuchMethod__ available?

早过忘川 提交于 2019-12-02 13:16:37
问题 I would like to extend localStorage by executing some code each time a setting is fetched/stored. I could define a getter/setter for all existing properties of localStorage , but the problem lies in new settings. For example, localStorage['somenewsetting'] = 123 creates a new setting. I would like to automatically define a getter/setter for this property so that my addition code is also executed for new settings. Basically I need Object.watch , but for all properties. What I found was _

Getting error while dealing with getter and setter in kotlin

混江龙づ霸主 提交于 2019-12-02 08:44:24
I have define the data class as: data class chatModel(var context:Context?) { var chatManger:ChatManager?=null //getter get() = chatManger //setter set(value) { /* execute setter logic */ chatManger = value } } Now how will i access the get() and set() function. In java I do like that: //for getter new chatModel().getJId() //for setter new chatModel().setJId("jid") edit: As the @yole suggested. I am using setter and getter as: //set the data var chatDetails:chatModel=chatModel(mApplicationContext) chatDetails.chatManger=chatManager But end up getting the java.lang.StackOverflowError: at com

How do I write setters and getters for an array? (c++)

大城市里の小女人 提交于 2019-12-02 06:54:08
问题 Im writing a class within c++, however I am not certain on how to create the setters and getters for the arrays (sorry for it being a basic question!) I am getting the following error: expected primary expression before ']' token Here is my code: Class planet: public body { private: string name[]; string star[]; public: void nameSetter (string h_name[]) { name[] = h_name[]; } }; Once again I am sorry for such I silly question, I know I am not passing an index through, however, when I create

Does Java have the equivalent of @synthesize in Objective-C?

夙愿已清 提交于 2019-12-02 06:34:07
问题 I am learning Obj-C and discovered the @synthesize directive which generates accessor and mutator methods. Groovy auto-generates getters/setters but I'm not sure if Java does. Does Java have a similar feature in Java 7? 回答1: As everyone has said, the answer is no, however Project Lombok could be of interest 回答2: No, java does not come with such a feature. 回答3: No, if I'm not mistaken, not yet at least. 回答4: Though Java does not, to my knowledge, have such a feature defined, several Java

Does Java have the equivalent of @synthesize in Objective-C?

依然范特西╮ 提交于 2019-12-02 02:54:10
I am learning Obj-C and discovered the @synthesize directive which generates accessor and mutator methods. Groovy auto-generates getters/setters but I'm not sure if Java does. Does Java have a similar feature in Java 7? As everyone has said, the answer is no, however Project Lombok could be of interest No, java does not come with such a feature. No, if I'm not mistaken, not yet at least. Though Java does not, to my knowledge, have such a feature defined, several Java coding environments (such as Eclipse) produce automatic getters and setters under certain circumstances. 来源: https:/

Calling the variable property directly vs getter/setters - OOP Design

℡╲_俬逩灬. 提交于 2019-12-01 15:47:38
I know this is probably subjective but I read this optimization page from Google for PHP and they suggest use the variable property directly without the need of getters and setters. Understandably I see the performance gain in this but is this really a good design practice to follow? Their Example using getter/setter: class dog { public $name = ''; public function setName($name) { $this->name = $name; } public function getName() { return $this->name; } } $rover = new dog(); $rover->setName('rover'); echo $rover->getName(); Suggested Optimization: $rover = new dog(); $rover->name = 'rover';

Scala getters and setters in Java class

若如初见. 提交于 2019-12-01 15:27:35
I would like to create a Java class that follows the Scala setters/getters convention. I tried following simple class, but it does not work: public class JavaA { private int a = 0; public int a() { return a; } public void a_$eq(int a) { this.a = a; } } But when I try to access it from scala: val x = new JavaA x.a = 1 and I get "reassignment to val" error message. I tried to look for this, but all issues I found where the other way around from scala to java. What is the right way to do it? Thanks! You can only sort of do this, and it's hard enough that you probably don't want to. What you can't

Calling the variable property directly vs getter/setters - OOP Design

笑着哭i 提交于 2019-12-01 13:53:52
问题 I know this is probably subjective but I read this optimization page from Google for PHP and they suggest use the variable property directly without the need of getters and setters. Understandably I see the performance gain in this but is this really a good design practice to follow? Their Example using getter/setter: class dog { public $name = ''; public function setName($name) { $this->name = $name; } public function getName() { return $this->name; } } $rover = new dog(); $rover->setName(