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How to sum a variable by group

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How do I auto-hide placeholder text upon focus using css or jquery?

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How to debug a Flask app

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sed one-liner to convert all uppercase to lowercase?

...sn't support \L \U): # Converts upper to lower case $ sed -e 's/\(.*\)/\L\1/' input.txt > output.txt # Converts lower to upper case $ sed -e 's/\(.*\)/\U\1/' input.txt > output.txt share | ...
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Android: How to enable/disable option menu item on button click?

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SQL Server: What is the difference between CROSS JOIN and FULL OUTER JOIN?

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What is the difference between __init__ and __call__?

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How to prevent scrollbar from repositioning web page?

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invalid byte sequence for encoding “UTF8”

... 112 If you need to store UTF8 data in your database, you need a database that accepts UTF8. You ca...
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When do we need curly braces around shell variables?

...%.*} (remove extension) expanding positional parameters beyond 9: "$8 $9 ${10} ${11}" Doing this everywhere, instead of just in potentially ambiguous cases, can be considered good programming practice. This is both for consistency and to avoid surprises like $foo_$bar.jpg, where it's not visually ...