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What are the differences among grep, awk & sed? [duplicate]
...e second column of file.txt
Basic awk usage:
Compute sum/average/max/min/etc. what ever you may need.
$ cat file.txt
A 10
B 20
C 60
$ awk 'BEGIN {sum=0; count=0; OFS="\t"} {sum+=$2; count++} END {print "Average:", sum/count}' file.txt
Average: 30
I recommend that you read this book: Sed &...
How can I scale an entire web page with CSS?
...at this does is proportionally enlarge the entire web page (fonts, images, etc).
9 Answers
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How can one print a size_t variable portably using the printf family?
...nu says %zu (or %zx, or %zd but that displays it as though it were signed, etc.)
Microsoft says %Iu (or %Ix, or %Id but again that's signed, etc.) — but as of cl v19 (in Visual Studio 2015), Microsoft supports %zu (see this reply to this comment)
...and of course, if you're using C++, you can u...
grid controls for ASP.NET MVC? [closed]
... and have had some good luck with it. Lots of options for inline editing, etc. If that stuff isn't necessary, then we've just used a plain foreach loop like @Hrvoje.
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How can I add a hint text to WPF textbox?
...isualBrush x:Key="CueBannerBrush" AlignmentX="Left" AlignmentY="Center" Stretch="None">
<VisualBrush.Visual>
<Label Content="Search" Foreground="LightGray" />
</VisualBrush.Visual>
</VisualBrush&g...
Why does the month argument range from 0 to 11 in JavaScript's Date constructor?
... if we'd say January Five, January Sixth, instead of January 5, January 6, etc., then perhaps they'd have made a 0-based enumeration for days too...
Perhaps subconsciously they thought about an enumeration for months as {January, February, ...} and for days as {One, Two, Three, ...}, except for day...
Is there a way to make GHC provide the type class constraints of typed holes?
... should be.
These potential instances exist:
instance Show Ordering -- Defined in ‘GHC.Show’
instance Show Integer -- Defined in ‘GHC.Show’
instance Show a => Show (Maybe a) -- Defined in ‘GHC.Show’
...plus 22 others
...plus 11 instances i...
Enabling error display in PHP via htaccess only
...n to the log file and then add the code
<Files php_errors.log>
Order allow,deny
Deny from all
Satisfy All
</Files>
at the end of .htaccess.
This will protect your log file.
These options are suited for a development server. For a production server you should not displa...
Re-entrant locks in C#
...
Actually, I don't think the order in which you release locks matters. The order in which you choose them definitely does, but as long as releasing the lock isn't conditional upon anything (you can release at any time), you should be fine as long as you ...
How to use a link to call JavaScript?
... button. This makes it a lot easier for screen readers, braille terminals, etc, to determine what's going on, and give visually impaired users useful information.
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