05-22-2008
arrays and needing length of fields
I have a sort of complex problem that I just can't figure out. I have data coming into a ksh program in a format that I need to parse out and display into a different format into a text file for printing. I have figured out how to get all the data in the format I need it in for the text file. The problem I am having is getting the columns to line up. They all need to be right justified and be as big as the max length of the data in each column. I won't know that until all the data is in the array. I don't know if I am explaining it well. I am going to try with a picture.
Col1 Col2 Col3 Col4 Col5
12345 12345 44 0 234
222222222 444 0 4444444 666666888999
This is how the data is coming out now. I am going to put it into an array, but have not done this yet. I don't know the length of each of the rows until I get the data.
So, each row is a separate column with its own length. I have just put spaces in between each column for now. I need it to look like this:
Col1 Col2 Col3 Col4 Col5
12345 12345 44 0 234
222222222 444 0 4444444 666666888999
As you can see I don't know what is the max length of each column until all the data is in. I need it to be right justified. I have no idea how to do this.
Is this a good explanation? I hope someone can help me. Thank you so much.
Allyson
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DP(8) [nmh-1.5] DP(8)
NAME
dp - parse dates 822-style
SYNOPSIS
/usr/lib/mh/dp [-form formatfile] [-format string] [-width columns] [-version] [-help] dates ...
DESCRIPTION
Dp is a program that parses dates according to the ARPA Internet standard. It also understands many non-standard formats, such as those
produced by TOPS-20 sites and some UNIX sites using ctime(3). It is useful for seeing how nmh will interpret a date.
The dp program treats each argument as a single date, and prints the date out in the official 822-format. Hence, it is usually best to
enclose each argument in quotes for the shell.
To override the output format used by dp, the -format string or -format file switches are used. This permits individual fields of the
address to be extracted with ease. The string is simply a format string and the file is simply a format file. See mh-format(5) for the
details.
Here is the default format string used by dp:
%<(nodate{text})error: %{text}%|%(putstr(pretty{text}))%>
which says that if an error was detected, print the error, a `:', and the date in error. Otherwise, output the 822-proper format of the
date.
FILES
$HOME/.mh_profile The user profile
PROFILE COMPONENTS
None
SEE ALSO
ap(8), Standard for the Format of ARPA Internet Text Messages (RFC-822)
DEFAULTS
`-format' default as described above
`-width' default to the width of the terminal
CONTEXT
None
BUGS
The argument to the -format switch must be interpreted as a single token by the shell that invokes dp. Therefore, one must usually place
the argument to this switch inside quotes.
MH.6.8 11 June 2012 DP(8)