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Regex, every non-alphanumeric character except white space or colon

... [^a-zA-Z\d\s:] \d - numeric class \s - whitespace a-zA-Z - matches all the letters ^ - negates them all - so you get - non numeric chars, non spaces and non colons share | improve this answ...
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Port 80 is being used by SYSTEM (PID 4), what is that?

...P adress is 0.0.0.0, state = LISTENING: means that port 80 is listening to all interfaces (not used) How to read NETSTAT -AN results: https://sites.google.com/site/xiangyangsite/home/technical-tips/linux-unix/networks-related-commands-on-linux/how-to-read-netstat--an-results ...
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Contains method for a slice

...re with map[string] struct{}. map[string] struct{} seems like a hack especially initializing an empty struct struct {}{} – vadasambar Sep 12 '19 at 12:17 ...
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In Python, using argparse, allow only positive integers

...still need to define an actual method that decides this for you: def check_positive(value): ivalue = int(value) if ivalue <= 0: raise argparse.ArgumentTypeError("%s is an invalid positive int value" % value) return ivalue parser = argparse.ArgumentParser(...) parser.add_argu...
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Android Eclipse - Could not find *.apk

... "Java Builder" from my Builders for the project, building the project manually, reordering my java build path. I have no visible compiler issues and no problems exist in my workspace. ...
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What are best practices for multi-language database design? [closed]

...e language. In some cases we add a DefaultLanguage field, so that we can fall-back to that language if no localized data is available for a specified language. Example: Table "Product": ---------------- ID : int <any other language-neutral fields> Table "ProductTranslation...
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Length of a JavaScript object

...an break enumerations in various libraries. Adding methods to Object is usually safe, though. Here's an update as of 2016 and widespread deployment of ES5 and beyond. For IE9+ and all other modern ES5+ capable browsers, you can use Object.keys() so the above code just becomes: var size = Object...
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What generates the “text file busy” message in Unix?

...table while it was running. For example, I was building a make workalike called rmk, and after a while it was self-maintaining. I would run the development version and have it build a new version. To get it to work, it was necessary to use the workaround: gcc -g -Wall -o rmk1 main.o -L. -lrmk -L...
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How can I use an array of function pointers?

...l; /* address of mul() */ p[3] = div; /* address of div() */ [...] To call one of those function pointers: result = (*p[op]) (i, j); // op being the index of one of the four functions share | ...
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tmux set -g mouse-mode on doesn't work

...ke scrolling with wheels work bind -n WheelUpPane if-shell -F -t = "#{mouse_any_flag}" "send-keys -M" "if -Ft= '#{pane_in_mode}' 'send-keys -M' 'select-pane -t=; copy-mode -e; send-keys -M'" bind -n WheelDownPane select-pane -t= \; send-keys -M This will enable scrolling on hover over a pane and y...