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Problems with Android Fragment back stack

... getting crash on this line fragmentManager.popBackStackImmediate();error: java.lang.IllegalStateException: FragmentManager is already executing transactions at com.example.myapplication.FragmentA$2.onBackStackChanged(FragmentA.java:43) – Priyanka ...
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MetadataException: Unable to load the specified metadata resource

... I had a similar error. I had recreated the project (long story), and pulled everything over from the old project. I hadn't realized that my model had been in a directory called 'Model' before, and was now in a directory called 'Models'. O...
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How to remove all white spaces in java [duplicate]

... java.lang.String class has method substring not substr , thats the error in your program. Moreover you can do this in one single line if you are ok in using regular expression. a.replaceAll("\\s+",""); share ...
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Why em instead of px?

I heard you should define sizes and distances in your stylesheet with em instead of in pixels. So the question is why should I use em instead of px when defining styles in css? Is there a good example that illustrates this? ...
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How to track down log4net problems

...the first entry under <configuration>. Otherwise you end up with an error. – Nick Jul 25 '17 at 13:59 ...
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What's the equivalent of use-commit-times for git?

I need the timestamps of files on my local and on my server to be in sync. This is accomplished with Subversion by setting use-commit-times=true in the config so that the last modified of each file is when it was committed. ...
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Index of Currently Selected Row in DataGridView

...innang when you have selected no row, @JayRiggs' solution will throw index error two. You'd better wrapped it with a if – Allan Ruin Mar 11 '15 at 1:22 add a comment ...
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Is it possible to write data to file using only JavaScript?

... @FirstBlood What part isn't working, are you getting an error? The file and link creation should work in Safari 7+ (I believe that stuff should also work using in Safari 6 if you use the prefixed version of URL). Setting the file name will not work in Safari because it still hasn'...
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How to sort a dataframe by multiple column(s)

... I have "invalid argument to unary operator" error while running the second example. – Nailgun Jan 22 '13 at 23:01 22 ...
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Catch a thread's exception in the caller thread in Python

... = bucket def run(self): try: raise Exception('An error occured here.') except Exception: self.bucket.put(sys.exc_info()) def main(): bucket = Queue.Queue() thread_obj = ExcThread(bucket) thread_obj.start() while True: try: ...