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Flatten an irregular list of lists

Yes, I know this subject has been covered before ( here , here , here , here ), but as far as I know, all solutions, except for one, fail on a list like this: ...
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How do i put a border on my grid in WPF?

How do i put a border on my grid in C#/WPF? 6 Answers 6 ...
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Finding three elements in an array whose sum is closest to a given number

Given an array of integers, A 1 , A 2 , ..., A n , including negatives and positives, and another integer S. Now we need to find three different integers in the array, whose sum is closest to the given integer S. If there exists more than one solution, any of them is ok. ...
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Defining a percentage width for a LinearLayout? [duplicate]

I want to define a percentage width (70%) for a LinearLayout that contains some buttons, so that I can center it and so that the child buttons can fill_parent. Here's a picture showing what I mean: ...
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Why does SIGPIPE exist?

From my understanding, SIGPIPE can only occur as the result of a write() , which can (and does) return -1 and set errno to EPIPE ... So why do we have the extra overhead of a signal? Every time I work with pipes I ignore SIGPIPE and have never felt any pain as a result, am I missing somethin...
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Nested JSON objects - do I have to use arrays for everything?

Is there any way to have nested objects in JSON so I don't have to make arrays out of everything? For my object to be parsed without error I seem to need a structure like this: ...
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How to determine function name from inside a function

If I have a Bash script like: 5 Answers 5 ...
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'parent.relativePath' points at my com.mycompany:MyProject instead of org.apache:apache - Why?

What is true is that Solr project directory is inside MyProject parent directory (but there's no module or any maven relationship between the 2, just FS convenience). Do I have to place it out? ...
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How to atomically delete keys matching a pattern using Redis

In my Redis DB I have a number of prefix:<numeric_id> hashes. 23 Answers 23 ...
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Why does Python code run faster in a function?

...de in Python runs in (Note: The timing is done with the time function in BASH in Linux.) 3 Answers ...