dynamic

问题 I have a table with over 200 column names which are created with a temporary name like - custColum1 -custColum200. I have a mapping table which contains a list of custColum1-custColumn200 to which name it has to be mapped with. For example Table1(custColum1,custColum2) Mappingtable(tempColumnName,RealColumnName) data in mapping table be like (custColum1,Role_number) (custColum2,Person_name) I need to change table 1 to Table1(Role_number,Person_name). Note: I cannot create table1 with this

问题 TL;DR Please provide a piece of code written in some well known dynamic language (e.g. JavaScript) and how that code would look like in Java bytecode using invokedynamic and explain why the usage of invokedynamic is a step forward here. Background I have googled and read quite a lot about the not-that-new-anymore invokedynamic instruction which everyone on the internet agrees on that it will help speed dynamic languages on the JVM. Thanks to stackoverflow I managed to get my own bytecode

问题 I was able to get my layout working with static kivy language but I need to be able to add items to my list via python. I've tried several things but can't seem to get anything working correctly. Here's what I have working statically. main.py #!/usr/bin/python import os import kivy kivy.require('1.8.0') from kivy.app import App from kivy.core.window import Window from kivy.logger import Logger from kivy.uix.boxlayout import BoxLayout from kivy.uix.button import Button class CustomButton

问题 I am recreating an app I have previously made in Swift, and on one of my pages we call an API and based on the results, we present the user a dynamic number of textfields to search by different search parameters. Is there any good way to do this in Dart/Flutter? Since dart doesn't support generating code at runtime, is this even a possibility? 回答1: I just modified @Felix's answer with using Map to store TextEditingControllers instead of list. I think its easy to call textEditingControllers

问题 I am recreating an app I have previously made in Swift, and on one of my pages we call an API and based on the results, we present the user a dynamic number of textfields to search by different search parameters. Is there any good way to do this in Dart/Flutter? Since dart doesn't support generating code at runtime, is this even a possibility? 回答1: I just modified @Felix's answer with using Map to store TextEditingControllers instead of list. I think its easy to call textEditingControllers

问题 I was wondering if it is possible to dynamically create variables in Go? I have provided a pseudo-code below to illustrate what I mean. I am storing the newly created variables in a slice: func method() { slice := make([]type) for(i=0;i<10;i++) { var variable+i=i; slice := append(slice, variablei) } } At the end of the loop, the slice should contain the variables: variable1, variable2...variable9 回答1: Go has no dynamic variables. Dynamic variables in most languages are implemented as Map

问题 I need to be able to do this: $ns = "\\common\\components\\cfoBi\\i18n\\{$countryCode}\\gimmea"; use $USP; Obviously this won't work. So how can I do this? Have "dynamic namespaces"? 回答1: Not possible. Namespaces, imports and aliases are resolved at compile time. However, it is possible to create objects from a class name that is built at runtime: $className = "common\\components\\cfoBi\\i18n\\{$countryCode}\\gimmea"; $object = new $className(); See PHP docs: http://php.net/manual/en/language

问题 Suppose that you have the following situation in .NET (C#): namespace MyDll { public class MyClass { public string GetValue() { return "wrong value"; } } } this code goes compiled into a dll say, MyDll.Dll. Then you have an application called MyApplication.exe that, using MyDll.dll as reference, creates an instance of the class MyClass and calls the method GetValue: MyClass instance = new MyClass(); instance.GetValue(); Once you realize that the current implementation of MyClass.GetValue() is

问题 I'm trying to create in C# WPF a DataGrid with dynamic columns binded to an observable collection of dynamic properties types created at runtime. This is my code : View WPF <DataGrid ItemsSource="{Binding MyCollectionVM, Mode=OneWay}" AutoGenerateColumns="True"> </DataGrid> Then in my ViewModel : public class MyStatiClass { public int ID { get; set; } public string Name { get; set; } public string Address { get; set; } } // Main View Model, using MVVMLight library public class MainViewModel :

问题 I'm trying to create in C# WPF a DataGrid with dynamic columns binded to an observable collection of dynamic properties types created at runtime. This is my code : View WPF <DataGrid ItemsSource="{Binding MyCollectionVM, Mode=OneWay}" AutoGenerateColumns="True"> </DataGrid> Then in my ViewModel : public class MyStatiClass { public int ID { get; set; } public string Name { get; set; } public string Address { get; set; } } // Main View Model, using MVVMLight library public class MainViewModel :