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实现一个简单的服务端推方案 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...有推和拉两种方式：如果是客户端拉的话，通常就是Polling；如果是服务端推的话，一般就是Comet，目前比较流行的Comet...客户端和服务端的交互有推和拉两种方式：如果是客户端拉的话，通常就是Polling；如果是服务端推的话，一...
how to convert binary string to decimal?
I want to convert binary string in to digit
E.g
9 Answers
9
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XPath query to get nth instance of an element
There is an HTML file (whose contents I do not control) that has several input elements all with the same fixed id attribute of "search_query" . The contents of the file can change, but I know that I always want to get the second input element with the id attribute "search_query" .
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How do I test if a string is empty in Objective-C?
How do I test if an NSString is empty in Objective-C?
30 Answers
30
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Submit a form using jQuery [closed]
I want to submit a form using jQuery. Can someone provide the code, a demo or an example link?
22 Answers
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Populating a razor dropdownlist from a List in MVC
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You can separate out your business logic into a viewmodel, so your view has cleaner separation.
First create a viewmodel to store the Id the user will select along with a list of items that will appear in the DropDown.
ViewModel:
public class UserRole...
How do I cancel form submission in submit button onclick event?
I'm working on an ASP.net web application.
13 Answers
13
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How to set margin of ImageView using code, not xml
I want to add an unknown number of ImageView views to my layout with margin. In XML, I can use layout_margin like this:
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Programmatically set the initial view controller using Storyboards
How do I programmatically set the InitialViewController for a Storyboard? I want to open my storyboard to a different view depending on some condition which may vary from launch to launch.
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how to implement a long click listener on a listview
...nLongClickListener on my list view. Whenever the user long press the item in list some action should be performed, But my code does not catch this listener. Please let me know where I am going wrong. The similar code works for setOnItemClickListener very well.
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