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Rails create or update magic?

I have a class called CachedObject that stores generic serialised objects indexed by key. I want this class to implement a create_or_update method. If an object is found it will update it, otherwise it will create a new one. ...
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Why do x86-64 systems have only a 48 bit virtual address space?

In a book I read the following: 10 Answers 10 ...
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String comparison in Python: is vs. == [duplicate]

I noticed a Python script I was writing was acting squirrelly, and traced it to an infinite loop, where the loop condition was while line is not '' . Running through it in the debugger, it turned out that line was in fact '' . When I changed it to !='' rather than is not '' , it worked fine. ...
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How to convert a string from uppercase to lowercase in Bash? [duplicate]

I have been searching to find a way to convert a string value from upper case to lower case. All the search results show approaches of using tr command. ...
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Matplotlib 2 Subplots, 1 Colorbar

I've spent entirely too long researching how to get two subplots to share the same y-axis with a single colorbar shared between the two in Matplotlib. ...
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Get the distance between two geo points

I want to make an app which checks the nearest place where a user is. I can easily get the location of the user and I have already a list of places with latitude and longitude. ...
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Rerender view on browser resize with React

How can I get React to re-render the view when the browser window is resized? 20 Answers ...
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How to debug Spring Boot application with Eclipse?

My Spring Boot webapp is running just fine, and I'd like to debug it through Eclipse. 13 Answers ...
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Wait until a process ends

I've an application which does 9 Answers 9 ...
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Check to see if python script is running

I have a python daemon running as a part of my web app/ How can I quickly check (using python) if my daemon is running and, if not, launch it? ...