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PHP static function being called in dynamic environment

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问题 Since when PHP allows to call static function like a dynamic function? I am using php 5.3.2 class weird{ public static function iamstatic($calledFrom){ echo "I am a static function called with a $calledFrom operator\n"; } public function test(){ self::iamstatic("static"); $this->iamstatic("dynamic"); } } $c = new weird(); $c->test(); weird::iamstatic("Static outside class"); $c->iamstatic("Dynamic outside class"); This outputs : I am a static function called with a static operator I am a

class attribute declaration [closed]

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问题 This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. Closed 6 years ago . I didn't use PHP in a while, but I've tried something like this: <?php class Something { public $x = 2 * 3; // (line 4) } This code triggers the

How to access “self” inside the scope of a class?

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问题 I've crossed an interesting problem. Suppose we have a class, and in its constructor we take a boolean as an argument. How can I define methods inside the class based on the instance's condition/boolean? For example: class X(): def __init__(self, x): self.x = x if self.x == true: # self is unreachable outside a method. def trueMethod(): print "The true method was defined." if self.x == false: # self is unreachable outside a method. def falseMethod(): print "The false method was defined." 回答1:

Cast to Implemented Class

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问题 So, I'm working in Java, Trying to cast a java.sql.ResultSet to my own class MyResultSet Here is the code: MyResultSet.java public class MyResultSet implements java.sql.ResultSet{ //There are a bunch of Implemented Methods here. None of them have any custom code, They are all unchanged. Just didn't want to put huge code in here. } The code I'm trying to use to cast it ResultSet r = getResultSet(); return (MyResultSet)r; Whenever I run this, I get a "ClassCastException". Could someone explain

Java：笔记-1

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ylbtech-Java：笔记-1 1. 返回顶部 1、 /** * 简介请求 * @return */ @RequestMapping("/JJ") public String jianjie(Model model){ List<Dict> list = dictService.getColumnByPlate("JJ"); List<Content> contentList = new ArrayList<>(); for (Dict dict : list) { //从每个栏目下获取第一条文章 List<Content> contents = contentService.queryByPlateAndColumn("JJ", dict.getCode(),1); contentList.add(contents.get(0)); } model.addAttribute("column",list); model.addAttribute("content",contentList); return "forward:/list_jianjie.jsp"; } 2、 <%@ page language="java" contentType="text/html; charset=utf-8" isELIgnored="false" pageEncoding="utf-8"

Python-Creating a Class- x object has no attribute 'split'

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问题 I am trying to create a class which takes a URL and allows me to split it into parts and return each of the scheme, server, and path. class SimpleURL: def __init__(self,url): self.url=url def scheme(self): return url.split("://")[0] def server(self): return url.split("/")[2] def path(self): return url.split(url.split("/")[2])[1] test_url = SimpleURL("https://gumgoose.com/larry/friendo") Then, if I run test_url.scheme() or any server or path, I get the error NameError: name 'url' is not

Python-Creating a Class- x object has no attribute 'split'

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Python: Change class type with decorator and keep it's methods

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问题 I want to create a class which could be used inside different Applications and their APIs to create UIs. Therefor I created a module called ui.py . Inside this module is the following: from PyQt4 import QtGui def CreateGui(uiFile, parent=None): print "Ui build.." def GetUiObject(uiClass): pUI = uiClass.PARENT class ParentUI(pUI): def __init__(self, uiFile): CreateGui(uiFile, self) def __call__(self, cls): for func in uiClass.__dict__: setattr(cls, func, uiClass.__dict__[func]) return ParentUI

I get StackOverflow error when I create new instance in external class

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问题 I have my main class CalculatorGUI.java and my second class KeyHandler.java. If I create instance of my main class in external class (e.g. CalculatorGUI one = new CalculatorGUI();), I get: Exception in thread "AWT-EventQueue-0" java.lang.StackOverflowError Why is that? I have to make this instance to use variables from y main GUI class. Here is my CalculatorGUI class: /* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools

VB Polymorphism Constructors Default and Properties. Similar Class to Listbox

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问题 I've been banging my head against a wall for sometime on this one. I'm trying to create a class for storing data on People with another class to store their Bank Transactions. Ideally, this all be hidden away and leave only simple statments, declarations and functions available to the programmer. These will include: Dim Clients As New ClientList Clients.Count 'readonly integer Clients.Add("S") Clients.Refresh() Clients(n).Remove() Clients(n).Transaction.Add() Clients(n).Transaction(n).Remove(