大约有 44,000 项符合查询结果（耗时：0.0332秒） [XML]
Differences between cookies and sessions?
I am training in web developement and am learning about JSP & Servlets . I have some knowledge of HttpSession - I have used it in some of my sample projects.
...
How to return an empty ActiveRecord relation?
If I have a scope with a lambda and it takes an argument, depending on the value of the argument, I might know that there will not be any matches, but I still want to return a relation, not an empty array:
...
On a CSS hover event, can I change another div's styling? [duplicate]
...
Yes, you can do that, but only if #b is after #a in the HTML.
If #b comes immediately after #a: http://jsfiddle.net/u7tYE/
#a:hover + #b {
background: #ccc
}
<div id="a">Div A</div>
<div id="b">Div B</div>
That's using the adjacent sibling c...
how to override action bar back button in android?
I want to customize the activity back button in action bar, not in hard key back button. I have overriden the onBackPressed() method. It works with my emulator back button, but not with action bar back button.
...
Android Fragment no view found for ID?
I have a fragment I am trying to add into a view.
34 Answers
34
...
mongodb count num of distinct values per field/key
Is there a query for calculating how many distinct values a field contains in DB.
5 Answers
...
Binding a WPF ComboBox to a custom list
...text to your ConnectionViewModel object?
I copied you code and made some minor modifications, and it seems to work fine.
I can set the viewmodels PhoneBookEnty property and the selected item in the combobox changes, and I can change the selected item in the combobox and the view models PhoneBookEnt...
Ways to implement data versioning in MongoDB
Can you share your thoughts how would you implement data versioning in MongoDB. (I've asked similar question regarding Cassandra . If you have any thoughts which db is better for that please share)
...
Remove array element based on object property
...;
Please note that filter creates a new array. Any other variables referring to the original array would not get the filtered data although you update your original variable myArray with the new reference. Use with caution.
...
How can I generate an INSERT script for an existing SQL Server table that includes all stored rows?
I'm looking for a way to generate a "Create and insert all rows" script with SQL Management Studio 2008 R2.
4 Answers
...