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How to communicate between iframe and the parent site?

...bsite in the iframe isn't located in the same domain , but both are mine, and I would like to communicate between the iframe and the parent site. Is it possible? ...
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Database design for a survey [closed]

...estions. For example: text fields for comments, multiple choice questions, and possibly questions that could contain more than one answer (i.e. check all that apply). ...
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How do I check if a string contains another string in Objective-C?

..."); } The key is noticing that rangeOfString: returns an NSRange struct, and the documentation says that it returns the struct {NSNotFound, 0} if the "haystack" does not contain the "needle". And if you're on iOS 8 or OS X Yosemite, you can now do: (*NOTE: This WILL crash your app if this code ...
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400 vs 422 response to POST of data

...est HTTP/1.1 status code for your use case. At the time of your question (and my original answer), RFC 7231 was not a thing; at which point I objected to 400 Bad Request because RFC 2616 said (with emphasis mine): The request could not be understood by the server due to malformed syntax. and ...
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How do you detect the clearing of a “search” HTML5 input?

... when the user clicks the "x". This is especially useful because it understands the "incremental" attribute. Now, having said that, I'm not sure if you can tell the difference between clicking the "x" and searching, unless you use an "onclick" hack. Either way, hopefully this helps. References: htt...
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Proper MIME media type for PDF files

When working with PDFs, I've run across the MIME types application/pdf and application/x-pdf among others. 3 Answers ...
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What is Prefix.pch file in Xcode?

...d to make compiling faster. Rather than parsing the same header files over and over, these files get parsed once, ahead of time. Xcode In Xcode, you add imports of the header files you want in a “prefix header,” and enabling Precompile Prefix Header so they get precompiled. But the idea behind a...
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How to use Python's pip to download and keep the zipped files for a package?

If I want to use the pip command to download a package (and its dependencies), but keep all of the zipped files that get downloaded (say, django-socialregistration.tar.gz) - is there a way to do that? ...
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How are multi-dimensional arrays formatted in memory?

...array1 to this function: void function1(int **a); you'll get a warning (and the app will fail to access the array correctly): warning: passing argument 1 of ‘function1’ from incompatible pointer type Because a 2D array is not the same as int **. The automatic decaying of an array into a ...
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Linq: GroupBy, Sum and Count

... I don't understand where the first "result with sample data" is coming from, but the problem in the console app is that you're using SelectMany to look at each item in each group. I think you just want: List<ResultLine> result = Lin...