Nice approach indeed!
Could be curtailed to
, including the item list file as well.
I went with this method inserted into a script. It worked well (and very quickly) the first time I tried it, but there was no output the second time. I will have to investigate what I did there.
I also made a second try before there were any responses here. This ended up looking more like the code posted by MadeInGermany where I read in the file to be modified and stored it in an array. I then did a double loop with the outside loop being my list file and the inside loop being the array with the file to be modified. Each item in the list was searched against the lines in the array. If a match was found, the array element was modified to remove the comment and then there was a break in the inner loop. The modified array was printed at the end. This approach means that each file is read in once and the output was written once, instead of once for each list item.
It seems to me that sed must be doing more or less the same thing under the hood. Every list item must be checked against every item in the file to be modified, at least until a match is found. I wasn't able to rationalize if it was more efficient to have one or the other file be the inner loop. The only approach I could think of that would be faster would be to identify the 'Gmax" value on each line of the file to be modified and then loop up that value in a map holding the list. That would, however, involve much more significant parsing of the lines to extract the 'Gmax' value. It is very nice to have a glob match, especially when there isn't a clear and consistent delimiter. If the list was the inner loop, you could delete each array element when a match was found and thus shorten the search as the process continues but deleting and shifting around array elements also takes resources.
Does anyone know what sed is doing to achieve the result so quickly? Is it mainly that is is using compiled code?
I have a dropdown menu built in perl tk (I am using active state perl). I want to select a value from the dropdown menu and I want to be able to perform some other actions depending upon what value is selected. I have all the graphical part made but I dont know how to get the selected value. Any... (0 Replies)
Requirement is:
1. comment and uncomment the line with Shell
Script: /opt/admin/fastpg/bin/fastpg.exe -c -=NET (using fastpg.exe as a search option)
2. display = "Commented" (when its commented) and display = "Uncommented" (when its uncommented)
Its urgent, please let me asap!!!
Thanks in... (2 Replies)
Hi,
I've a list in the following format:
Empdept filedetails buildingNo Area
AAA 444 2 juy
AAA 544 2 kui
AAA 567 4 poi
AAA 734 5 oiu
AAA 444 ... (2 Replies)
I have a combo.cgi here. this is linux environment
What i am going to do is this combobox will list down all the flatfile name in this /u/test/cgi-bin/List directory.
after that, i wanted it to open the flatfile and display the content of the flatfile into another listbox or textarea in this page... (0 Replies)
Hi,
I have the following lines that I would like to see in an array for easy comparisons and printing:
Example 1:
field1,field2,field3,field4,field5
value1,value2,value3,value4,value5Example 2:
field1,field3,field4,field2,field5,field6,field7... (7 Replies)
Hi All,
Need a small help in writing a shell script which can delete a few lines from a file which is currently being used by another process.
File gets appended using tee -a command due to which its size is getting increased.
Contents like :
25/09/2012 05:18 Run ID:56579677-1
My... (3 Replies)
cd path
line1
line2
line3
line4
line5
Lets say thats the sample script...So say if i have to comment the above script, which would be the better way so that whenever i want, i cud comment or uncomment the same.
Thanks (1 Reply)
I have one master file "File1" with all such info in it. I need to grep each object under each list from another file "File2". Can anyone help me with a script for this.
File 1
------
List 1
Object 1
Object 2
List 2
Object 3
Object 1
List 3
Object 2
... (5 Replies)
Hello,
I have some tab delimited text data,
file: final_temp1
aname val
NAME;r'(1,) 3.28584
r'(2,)<tab>
NAME;r'(3,) 6.13003
NAME;r'(4,) 4.18037
r'(5,)<tab>
You can see that the data is incomplete in some cases. There is a trailing tab after the first column for each incomplete row. I... (2 Replies)
Hello,
I need to collect some statistical results from a series of files that are being generated by other software. The files are tab delimited. There are 4 different sets of statistics in each file where there is a line indicating what the statistic set is, followed by 5 lines of values. It... (8 Replies)
Discussion started by: LMHmedchem
8 Replies
LEARN ABOUT HPUX
paste
paste(1) General Commands Manual paste(1)NAME
paste - merge same lines of several files or subsequent lines of one file
SYNOPSIS
file1 file2 ...
list file1 file2 ...
list] file1 file2 ...
DESCRIPTION
In the first two forms, concatenates corresponding lines of the given input files file1, file2, etc. It treats each file as a column or
columns in a table and pastes them together horizontally (parallel merging). In other words, it is the horizontal counterpart of cat(1)
which concatenates vertically; i.e., one file after the other. In the option form above, replaces the function of an older command with
the same name by combining subsequent lines of the input file (serial merging). In all cases, lines are glued together with the tab char-
acter, or with characters from an optionally specified list. Output is to standard output, so can be used as the start of a pipe, or as a
filter if is used instead of a file name.
recognizes the following options and command-line arguments:
Without this option, the new-line characters
of all but the last file (or last line in case of the option) are replaced by a tab character. This option allows replac-
ing the tab character by one or more alternate characters (see below).
list One or more characters immediately following replace the default tab as the line concatenation character. The list is
used circularly; i.e., when exhausted, it is reused. In parallel merging (that is, no option), the lines from the last
file are always terminated with a new-line character, not from the list. The list can contain the special escape
sequences: (new-line), (tab), (backslash), and (empty string, not a null character). Quoting may be necessary if charac-
ters have special meaning to the shell. (For example, to get one backslash, use ).
Merge subsequent lines rather than one from each input file.
Use tab for concatenation, unless a list is specified with the option. Regardless of the list, the very last character of
the file is forced to be a new-line.
Can be used in place of any file name
to read a line from the standard input (there is no prompting).
EXTERNAL INFLUENCES
Environment Variables
determines the locale for the interpretation of text as single- and/or multi-byte characters.
determines the language in which messages are displayed.
If or is not specified in the environment or is set to the empty string, the value of is used as a default for each unspecified or empty
variable. If is not specified or is set to the empty string, a default of "C" (see lang(5)) is used instead of
If any internationalization variable contains an invalid setting, behaves as if all internationalization variables are set to "C". See
environ(5).
International Code Set Support
Single- and multi-byte character code sets are supported.
RETURN VALUE
These commands return the following values upon completion:
Completed successfully.
An error occurred.
EXAMPLES
List directory in one column:
List directory in four columns
Combine pairs of lines into lines
Notes
works similarly, but creates extra blanks, tabs and new-lines for a nice page layout.
DIAGNOSTICS
Except for the option, no more than - 3 input files can be specified (see limits(5)).
AUTHOR
was developed by OSF and HP.
SEE ALSO cut(1), grep(1), pr(1).
STANDARDS CONFORMANCE paste(1)