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Recursive sub folder search and return files in a list python

I am working on a script to recursively go through subfolders in a mainfolder and build a list off a certain file type. I am having an issue with the script. Its currently set as follows ...
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jQuery: checking if the value of a field is null (empty)

Is this a good way to check if the value of a field is null ? 7 Answers 7 ...
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Check whether a path is valid

I am just wondering: I am looking for a way to validate if a given path is valid. (Note: I do not want to check if a file is existing! I only want to proof the validity of the path - So if a file could possibly exists at the location) . ...
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Which regular expression operator means 'Don't' match this character?

*, ?, + characters all mean match this character. Which character means 'don't' match this? Examples would help. 4 Answers...
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Get first day of week in SQL Server

I am trying to group records by week, storing the aggregated date as the first day of the week. However, the standard technique I use for rounding off dates does not appear to work correctly with weeks (though it does for days, months, years, quarters and any other timeframe I've applied it to). ...
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How to un-submodule a Git submodule?

What are the best practices for un-submoduling a Git submodule, bringing all the code back into the core repository? 12 Ans...
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How can you sort an array without mutating the original array?

Let's suppose I wanted a sort function that returns a sorted copy of the inputted array. I naively tried this 6 Answers ...
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Sleep until a specific time/date

I want my bash script to sleep until a specific time. So, I want a command like "sleep" which takes no interval but an end time and sleeps until then. ...
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How to define several include path in Makefile

New to C++; Basic understanding of includes, libraries and the compile process. Did a few simple makefiles yet. 2 Answers ...
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Stop setInterval call in JavaScript

I am using setInterval(fname, 10000); to call a function every 10 seconds in JavaScript. Is it possible to stop calling it on some event? ...