大约有 40,000 项符合查询结果（耗时：0.0599秒） [XML]
C#泛型(List)中基类和子类 怎么转换？ - .NET(C#) - 清泛IT论坛，有思想、有深度
List<ChildClass> childList = ...
Foo(List<BaseClass> baseList);
需求：把子类列表传入函数Foo，Foo支持所有子类列表。
方法一：
Foo(childList.Select(p => p as BaseClass).ToList())
上述 Select 转换是双向的，基类转子类也没问题。
方...
C# 多线程、并行处理全攻略（持续更新） - .NET(C#) - 清泛IT论坛，有思想、有深度
一、多线程（Thread）：
using System.Threading;
...
Thread t = new Thread(new ThreadStart(delegate
{
Proxy(delegate
{
button3.Enabled = false;
...
Async Procedures 拓展：异步任务拓展，异步处理耗时任务 - App Inventor 2...
Async ProcAsync Proc is an Extension which you can use to run a Procedure asynchronously. You no longer have to wait for a loop to finish and don’t worry about your app Crashing due to Android System thinking that your app crashed while doing intense processes.BLOCKS:EVENTS :
[color=var(--tertiar...
Unioning two tables with different number of columns
... I realized that this solution also works without having to list all the columns. So instead of Select Col1, Col2, Col3, Null as Col4, Null as Col5 from Table2, one can also do, Select *, Null as Col4, Null as Col5 from Table2.
– Pratik Patel
Sep 20 '...
ssh: Could not resolve hostname [hostname]: nodename nor servname provided, or not known
...etc.) !
– parasrish
Feb 1 '16 at 12:32
add a comment
|
...
Difference between getDefaultSharedPreferences and getSharedPreferences
...es a default preference-file name. This default is set per application, so all activities in the same app context can access it easily as in the following example:
SharedPreferences spref = PreferenceManager.getDefaultSharedPreferences(this);
if (spref.contains("email")) {
String sEmailAdd...
How to set focus on input field?
...nction ($timeout, $parse) {
return {
//scope: true, // optionally create a child scope
link: function (scope, element, attrs) {
var model = $parse(attrs.focusMe);
scope.$watch(model, function (value) {
console.log('value=', value);
...
Why start an ArrayList with an initial capacity?
... |
edited Aug 7 '17 at 13:32
answered Mar 15 '13 at 10:47
I...
Access Enum value using EL with JSTL
I have an Enum called Status defined as such:
13 Answers
13
...
How to show and update echo on same line
...hat saves me from going to a new line each time I echo something.
-e will allow me to interpret backslash escape symbols.
Guess what escape symbol I want to use for this: \r. Yes, carriage return would send me back to the start and it will visually look like I am updating on the same line.
So the...