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What is the best way to repeatedly execute a function every x seconds?

I want to repeatedly execute a function in Python every 60 seconds forever (just like an NSTimer in Objective C). This code will run as a daemon and is effectively like calling the python script every minute using a cron, but without requiring that to be set up by the user. ...
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JavaScript check if variable exists (is defined/initialized)

Which method of checking if a variable has been initialized is better/correct? (Assuming the variable could hold anything (string, int, object, function, etc.)) ...
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How to use comments in Handlebar templates?

...sing Handlebar.js as my templating engine. Now I want to comment out some of the blocks in my handlebar templates. But then I realized that Handlebar doesn't ignore the expressions inside the Handlebar comment block. Any workaround for this? ...
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How to pass command line argument to gnuplot?

I want to use gnuplot to draw figure from data file, say foo.data . Currently, I hardcoded the data file name in the command file, say foo.plt , and run command gnuplot foo.plg to plot data. However, I want to pass the data file name as a command argument, e.g. running command gnuplot foo.plg f...
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SQL Server Regular expressions in T-SQL

...expression library written in T-SQL (no CLR, no extended SP , pure T-SQL) for SQL Server, and that should work with shared hosting? ...
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position: fixed doesn't work on iPad and iPhone

I have been struggling with fixed positioning in iPad for a while. I know iScroll and it does not always seem to work (even in their demo). I also know that Sencha has a fix for that, but I couldn't Ctrl + F the source code for that fix. ...
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What does {0} mean when initializing an object?

When {0} is used to initialize an object, what does it mean? I can't find any references to {0} anywhere, and because of the curly braces Google searches are not helpful. ...
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How to move all files including hidden files into parent directory via *

Its must be a popular question but I could not find an answer. 7 Answers 7 ...
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How to convert R Markdown to PDF?

I've previously asked about the commands for converting R Markdown to HTML . 8 Answers ...
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YouTube API to fetch all videos on a channel

We need a video list by channel name of YouTube (using the API). 14 Answers 14 ...