大约有 15,000 项符合查询结果（耗时：0.0210秒） [XML]
CSS background image alt attribute
This is one I have not had to tackle before. I need to use alt tags on all images in a site including those used by CSS background-image attribute.
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Change an HTML5 input's placeholder color with CSS
Chrome supports the placeholder attribute on input[type=text] elements (others probably do too).
37 Answers
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How to open a specific port such as 9090 in Google Compute Engine
I have 2 Google Compute Engine instances and I want to open port 9090 in both the instances. I think we need to add some firewall rules.
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Truncating floats in Python
I want to remove digits from a float to have a fixed number of digits after the dot, like:
29 Answers
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What does the “~” (tilde/squiggle/twiddle) CSS selector mean?
Searching for the ~ character isn't easy. I was looking over some CSS and found this
5 Answers
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Is there a timeout for idle PostgreSQL connections?
I see a lot of them. We are trying to fix our connection leak. But meanwhile, we want to set a timeout for these idle connections, maybe max to 5 minute.
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What is the purpose of willSet and didSet in Swift?
...nt seems to be that sometimes, you need a property that has automatic storage and some behavior, for instance to notify other objects that the property just changed. When all you have is get/set, you need another field to hold the value. With willSet and didSet, you can take action when the value is...
UIRefreshControl without UITableViewController
Just curious, as it doesn't immediately seem possible, but is there a sneaky way to leverage the new iOS 6 UIRefreshControl class without using a UITableViewController subclass?
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c# datatable to csv
Could somebody please tell me why the following code is not working. The data is saved into the csv file, however the data is not separated. It all exists within the first cell of each row.
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When should TaskCompletionSource be used?
AFAIK, all it knows is that at some point, its SetResult or SetException method is being called to complete the Task<T> exposed through its Task property.
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