class

Infix to postfix conversion in java

由 生来就可爱ヽ(ⅴ＜●) 提交于 2020-01-13 18:15:29
问题 I have a java class that converts infix expression to postfix. I have managed to make the class run without errors but it is not giving me the right output. The output is suppose to be in form : InToPost: converting expressions from infix to postfix... [A, +, B] [A, +, B, *, C] [A, +, B, *, C, +, D] [(, A, +, B, ), *, C] [(, A, +, B, ), /, (, C, -, D, )] [(, (, A, +, B, ), *, C, -, (, D, -, E, ), )] InToPost: emitting postfix expressions... A B + A B C * + A B C * + D + A B + C * A B + C D -

面向对象

由 杀马特。学长 韩版系。学妹 提交于 2020-01-13 16:47:24
【类和对象的基本使用】 类的声明 调用 属性、方法 //声明类 class Cat { //定义属性 public $name = '咪咪'; public $sex = null; //定义方法 public function jiao() { echo '喵喵~'; } } //实例化 $c1 = new Cat(); var_dump($c1); //调用 属性、方法 echo $c1->name; $c1->jiao(); $c1->sex = '母'; echo $c1->sex; 传递赋值和引用赋值 $a = 'abc'; $b = $a;//传递赋值 $c = &$a;//引用赋值 var_dump($a);//abc var_dump($b);//abc var_dump($c);//abc $a = 'qq'; var_dump($a);//qq var_dump($b);//abc var_dump($c);//qq 对象的传递赋值 class MyClass { public $str = 'abc'; } $a = new MyClass(); //$a 存的是对象的标识符 $b = $a;//传递赋值 把标识符 赋值给 $b var_dump($a);//$str = 'abc' var_dump($b);//$str = 'abc' $a->str =

how to change value of html element by classname using javascript

由 倾然丶 夕夏残阳落幕 提交于 2020-01-13 11:54:47
问题 Here is the code i am using to change value of html element *** <a class="classname" href="Vtech.com"> This text to be chnage</a> <script type="text/javascript"> document.getElementsByClassName("classname")[0].innerHTML = "aaaaaaqwerty"; </script> how can I change this text on page load instans 回答1: Seems you need to add DOMContentLoaded or put your script before </body> Native JavaScript solution document.addEventListener("DOMContentLoaded", function(event) { document.getElementsByClassName(

AS3 Error: '1172: Definition fl.controls:Button could not be found.'

由 余生颓废 提交于 2020-01-13 11:50:52
问题 I am trying to create a class called LinkButton, which is a simple class that loads a URL on a click (im doing this to simpify my designers' transition to AS3) . Even though I am importing the button definition, the AS file gets a compile error: 1046: Type was not found or was not a compile-time constant: Button. and 1172: Definition fl.controls:Button could not be found. I created the button by making a simple shape converting it to a symbol (F8) of type 'Button'. In my FLA file i have this

AS3 Error: '1172: Definition fl.controls:Button could not be found.'

由 折月煮酒 提交于 2020-01-13 11:48:10
问题 I am trying to create a class called LinkButton, which is a simple class that loads a URL on a click (im doing this to simpify my designers' transition to AS3) . Even though I am importing the button definition, the AS file gets a compile error: 1046: Type was not found or was not a compile-time constant: Button. and 1172: Definition fl.controls:Button could not be found. I created the button by making a simple shape converting it to a symbol (F8) of type 'Button'. In my FLA file i have this

Delete this object inside the class

由 巧了我就是萌 提交于 2020-01-13 11:43:08
问题 private class Node { Item name; Node next; public void deleteObject() { this = null; } } Is it possible to delete object inside class? I am trying to do above, but it gives an error, that left-side should be a variable. Node is inner class. Thank you. Edit: var1 and var2 has reference to the object of this class, when I delete var1 by doing var1 = null , I want that var2 would be deleted too. 回答1: No, that's not possible. Neither is it necessary. The object will be eligible for garbage

manual object constructor call

由 亡梦爱人 提交于 2020-01-13 11:29:48
问题 Can you please tell me if it is possible to call object constructor manually ? I know it's wrong and I would never do something like that in my own code and I know I can fix this problem by creating and calling initialization function, however the problem is that I stumbled at a case where there are thousands of lines of code in object's and its parents' constructors... class MyClass() { MyClass() { } virtual ~MyClass(); void reset() { this->~MyClass(); this->MyClass::MyClass(); //error:

Class, Module, their eigenclasses, and method lookup

由 人走茶凉 提交于 2020-01-13 10:43:58
问题 Let's open class Module and add a method to it: class Module def foo puts "phew" end end I can call this method by doing this, Class.foo which is understandable because class of Class is Class , whose superclass is Module . so it can call instance methods defined in Module . Now, the method bar below is defined on Module 's eigenclass: class Module def self.bar puts "bar" end end but now Class.bar also works. Can someone explain me how Class can access methods in Module 's eigenclass? I think

Class, Module, their eigenclasses, and method lookup

由 邮差的信 提交于 2020-01-13 10:43:09
问题 Let's open class Module and add a method to it: class Module def foo puts "phew" end end I can call this method by doing this, Class.foo which is understandable because class of Class is Class , whose superclass is Module . so it can call instance methods defined in Module . Now, the method bar below is defined on Module 's eigenclass: class Module def self.bar puts "bar" end end but now Class.bar also works. Can someone explain me how Class can access methods in Module 's eigenclass? I think

Class, Module, their eigenclasses, and method lookup

由 末鹿安然 提交于 2020-01-13 10:43:07
问题 Let's open class Module and add a method to it: class Module def foo puts "phew" end end I can call this method by doing this, Class.foo which is understandable because class of Class is Class , whose superclass is Module . so it can call instance methods defined in Module . Now, the method bar below is defined on Module 's eigenclass: class Module def self.bar puts "bar" end end but now Class.bar also works. Can someone explain me how Class can access methods in Module 's eigenclass? I think
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