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Convert decimal to hexadecimal in UNIX shell script

... echo "obase=16; 34" | bc If you want to filter a whole file of integers, one per line: ( echo "obase=16" ; cat file_of_integers ) | bc share | imp...
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Convert HashBytes to VarChar

... CONVERT() doesn't work in SQL 2005. If you're using SQL 2008 or above, then use CONVERT() all you want. Sadly I'm not aware of a single command which will work for all SQL versions, so either do some crazy version checking in your script, or just make a note so...
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NoSql Crash Course/Tutorial [closed]

...om here, Wikipedia, etc). This could be due to the lack of concrete and uniform definition of what it is (more of a paradigm than concrete implementation), but I'm struggling to wrap my head around how I would go about designing a system that would use it or how I would implement it in my system. ...
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Set a path variable with spaces in the path in a Windows .cmd file or batch file

I'm new to script writing and can't get this one to work. I could if I moved the files to a path without a space in it, but I'd like it to work with the space if it could. ...
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What does “export” do in shell programming? [duplicate]

...there is no output from the grep command. Of course, feel free to rollback if you think this loses readability – fedorqui 'SO stop harming' Apr 26 '15 at 18:53 1 ...
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How to remove the first character of string in PHP?

... Be aware of unicode. If you're dealing with an arbitrary string (e.g. "Ål <- danish for eel"), you should use mb_substr and specify the encoding. – Thomas Jensen Jun 17 '12 at 11:22 ...
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Check whether a path is valid

I am just wondering: I am looking for a way to validate if a given path is valid. (Note: I do not want to check if a file is existing! I only want to proof the validity of the path - So if a file could possibly exists at the location) . ...
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Convert integer to binary in C#

...y similar method to convert binary to decimal? – kashif Jan 24 '13 at 8:26 32 @kashif int value =...
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Add up a column of numbers at the Unix shell

... . . .| x=$(echo <(cat)); echo $((0+${x// /+}+0)) if you want all bash all the time: – qneill Apr 3 '15 at 23:31 ...
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Determine the number of NA values in a column

... @user3274289: although you'll usually want na.rm=TRUE, because otherwise if df$col contains NAs, sum will return NA. – jbaums Jun 4 '14 at 2:30 ...