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Is arr.__len__() the preferred way to get the length of an array in Python?

In Python , is the following the only way to get the number of elements? 8 Answers 8 ...
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Run cron job only if it isn't already running

...f watchdog for a daemon that I've created. If the daemon errors out and fails, I want the cron job to periodically restart it... I'm not sure how possible this is, but I read through a couple of cron tutorials and couldn't find anything that would do what I'm looking for... ...
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How to group time by hour or by 10 minutes

like when I do 13 Answers 13 ...
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Converting Dictionary to List? [duplicate]

I'm trying to convert a Python dictionary into a Python list, in order to perform some calculations. 7 Answers ...
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How can I plot with 2 different y-axes?

I would like superimpose two scatter plots in R so that each set of points has its own (different) y-axis (i.e., in positions 2 and 4 on the figure) but the points appear superimposed on the same figure. ...
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Difference between null and empty (“”) Java String

What is the difference between null and the "" (empty string)? 22 Answers 22 ...
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Have bash script answer interactive prompts [duplicate]

Is it possible to have a bash script automatically handle prompts that would normally be presented to the user with default actions? Currently I am using a bash script to call an in-house tool that will display prompts to the user (prompting for Y/N) to complete actions, however the script I'm writ...
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Windows XP or later Windows: How can I run a batch file in the background with no window displayed?

I know I have already answered a similar question ( Running Batch File in background when windows boots up ), but this time I need to launch a batch: ...
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WordPress is giving me 404 page not found for all pages except the homepage

All of a sudden I go to my WordPress website and all the pages give me a 404 page not found page. I'm assuming the problem lies with the permalink structure, which I could swear I did not touch. The permalink setting is on "month and name." ...
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Show current state of Jenkins build on GitHub repo

Is there a way to show the Jenkins build status on my project's GitHub Readme.md? 12 Answers ...