Visit Our UNIX and Linux User Community

Full Discussion: Split values using awk
Top Forums UNIX for Beginners Questions & Answers Split values using awk Post 303046307 by RudiC on Thursday 30th of April 2020 10:22:07 AM
Old 04-30-2020
Or, awk:
Code:
awk -F"[,;]+" 'NR == 1 {print; next} {for (i=2; i<=NF; i++) print $1, " " $i}' OFS=, file
Name , Company_Worked (Header)
Asley, IBM
Asley, Amazon
Asley, BOA
Asley, Google
King.Jr, Wipro
King.Jr, Microsoft
King.Jr, AMZ

These 2 Users Gave Thanks to RudiC For This Post:
 
Test Your Knowledge in Computers #956
Difficulty: Medium
A polymorphic virus infects files with an encrypted copy of itself which is decoded by a decryption module which is modified on each infection.
True or False?

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Split a file with no pattern -- Split, Csplit, Awk

I have gone through all the threads in the forum and tested out different things. I am trying to split a 3GB file into multiple files. Some files are even larger than this. For example: split -l 3000000 filename.txt This is very slow and it splits the file with 3 million records in each... (10 Replies)
Discussion started by: madhunk
10 Replies

2. Shell Programming and Scripting

split variable values into array

i have these values inside variable $blah BUNGA TERATAI 3 5055 ITH 1 0 0 0 1 1 JADE TRADER 143W ITH 4 0 0 0 4 4 MOL SPLENDOR 0307A ITH 3 0 0 0 3 3 so how do I split them into array with the... (4 Replies)
Discussion started by: finalight
4 Replies

3. Shell Programming and Scripting

How to pick values from column based on key values by usin AWK

Dear Guyz:) I have 2 different input files like this. I would like to pick the values or letters from the inputfile2 based on inputfile1 keys (A,F,N,X,Z). I have done similar task by using awk but in that case the inputfiles are similar like in inputfile2 (all keys in 1st column and values in... (16 Replies)
Discussion started by: repinementer
16 Replies

4. Shell Programming and Scripting

AWK: read values from file1; search for values in file2

I have read another post about this issue and am wondering how to adapt it to my own, much simpler, issue. I have a file of user IDs like so: 333333 321321 546465 ...etc I need to take each number and use it to print records wherein the 5th field matches the user ID pulled from the... (2 Replies)
Discussion started by: Bubnoff
2 Replies

5. Shell Programming and Scripting

Split the values

ABC|DFE HYK|YUI is the contents in file. I am using the for loop for for value_list in `cat ./file` ; do echo $value_list cat use_firstvalue > second_value done I have to split the based on '|' and it should be used as a varaible in the cat command. How to do that. Please help me... (3 Replies)
Discussion started by: sandy1028
3 Replies

6. Shell Programming and Scripting

awk to split one field and print the last two fields within the split part.

Hello; I have a file consists of 4 columns separated by tab. The problem is the third fields. Some of the them are very long but can be split by the vertical bar "|". Also some of them do not contain the string "UniProt", but I could ignore it at this moment, and sort the file afterwards. Here is... (5 Replies)
Discussion started by: yifangt
5 Replies

7. Shell Programming and Scripting

Shell Script:split the values

Hi, I have file like below as file.txt Linux sptpp1a 2.6.18 348.1.1.el5 xxxxx 05/02/2013 %usr %sys %wio %idle 14:18:30 0 1 0 99 14:18:40 1 1 0 98 14:18:50 1 1 0 98 14:19:00 ... (5 Replies)
Discussion started by: Mani_apr08
5 Replies

8. Shell Programming and Scripting

Split file according to column values

Hi all, I am trying to split a file by the values of the FIRST column. The following awk works to split the file by the value of the LAST column -- How can I alter this to divide the column by the FIRST column?? awk -F"\t" '{ print > $NF ; close($NF)}' filename1Thanks! (5 Replies)
Discussion started by: owwow14
5 Replies

9. Shell Programming and Scripting

awk file to read values from Db2 table replacing hard coded values

Hi, I want to replace a chain of if-else statement in an old AWK file with values from Db2 table or CSV file. The part of code is below... if (start_new_rec=="true"){ exclude_user="false"; user=toupper($6); match(user, "XXXXX."); if (RSTART ==2 ) { ... (9 Replies)
Discussion started by: asandy1234
9 Replies

10. Shell Programming and Scripting

Split a content in a file with specific interval base on the delimited values using UNIX command

Hi All, we have a requirement to split a content in a text file every 5 rows and write in a new file . conditions: if 5th line falls between center of the statement . it should look upto after ";" files are below format: 1 UPDATE TABLE TEST1 SET VALUE ='AFDASDFAS' 2 WHERE... (3 Replies)
Discussion started by: KK230689
3 Replies
A2P(1)							 Perl Programmers Reference Guide						    A2P(1)

NAME
a2p - Awk to Perl translator SYNOPSIS
a2p [options] [filename] DESCRIPTION
A2p takes an awk script specified on the command line (or from standard input) and produces a comparable perl script on the standard output. OPTIONS Options include: -D<number> sets debugging flags. -F<character> tells a2p that this awk script is always invoked with this -F switch. -n<fieldlist> specifies the names of the input fields if input does not have to be split into an array. If you were translating an awk script that processes the password file, you might say: a2p -7 -nlogin.password.uid.gid.gcos.shell.home Any delimiter can be used to separate the field names. -<number> causes a2p to assume that input will always have that many fields. -o tells a2p to use old awk behavior. The only current differences are: o Old awk always has a line loop, even if there are no line actions, whereas new awk does not. o In old awk, sprintf is extremely greedy about its arguments. For example, given the statement print sprintf(some_args), extra_args; old awk considers extra_args to be arguments to "sprintf"; new awk considers them arguments to "print". "Considerations" A2p cannot do as good a job translating as a human would, but it usually does pretty well. There are some areas where you may want to examine the perl script produced and tweak it some. Here are some of them, in no particular order. There is an awk idiom of putting int() around a string expression to force numeric interpretation, even though the argument is always integer anyway. This is generally unneeded in perl, but a2p can't tell if the argument is always going to be integer, so it leaves it in. You may wish to remove it. Perl differentiates numeric comparison from string comparison. Awk has one operator for both that decides at run time which comparison to do. A2p does not try to do a complete job of awk emulation at this point. Instead it guesses which one you want. It's almost always right, but it can be spoofed. All such guesses are marked with the comment ""#???"". You should go through and check them. You might want to run at least once with the -w switch to perl, which will warn you if you use == where you should have used eq. Perl does not attempt to emulate the behavior of awk in which nonexistent array elements spring into existence simply by being referenced. If somehow you are relying on this mechanism to create null entries for a subsequent for...in, they won't be there in perl. If a2p makes a split line that assigns to a list of variables that looks like (Fld1, Fld2, Fld3...) you may want to rerun a2p using the -n option mentioned above. This will let you name the fields throughout the script. If it splits to an array instead, the script is probably referring to the number of fields somewhere. The exit statement in awk doesn't necessarily exit; it goes to the END block if there is one. Awk scripts that do contortions within the END block to bypass the block under such circumstances can be simplified by removing the conditional in the END block and just exiting directly from the perl script. Perl has two kinds of array, numerically-indexed and associative. Perl associative arrays are called "hashes". Awk arrays are usually translated to hashes, but if you happen to know that the index is always going to be numeric you could change the {...} to [...]. Iteration over a hash is done using the keys() function, but iteration over an array is NOT. You might need to modify any loop that iterates over such an array. Awk starts by assuming OFMT has the value %.6g. Perl starts by assuming its equivalent, $#, to have the value %.20g. You'll want to set $# explicitly if you use the default value of OFMT. Near the top of the line loop will be the split operation that is implicit in the awk script. There are times when you can move this down past some conditionals that test the entire record so that the split is not done as often. For aesthetic reasons you may wish to change index variables from being 1-based (awk style) to 0-based (Perl style). Be sure to change all operations the variable is involved in to match. Cute comments that say "# Here is a workaround because awk is dumb" are passed through unmodified. Awk scripts are often embedded in a shell script that pipes stuff into and out of awk. Often the shell script wrapper can be incorporated into the perl script, since perl can start up pipes into and out of itself, and can do other things that awk can't do by itself. Scripts that refer to the special variables RSTART and RLENGTH can often be simplified by referring to the variables $`, $& and $', as long as they are within the scope of the pattern match that sets them. The produced perl script may have subroutines defined to deal with awk's semantics regarding getline and print. Since a2p usually picks correctness over efficiency. it is almost always possible to rewrite such code to be more efficient by discarding the semantic sugar. For efficiency, you may wish to remove the keyword from any return statement that is the last statement executed in a subroutine. A2p catches the most common case, but doesn't analyze embedded blocks for subtler cases. ARGV[0] translates to $ARGV0, but ARGV[n] translates to $ARGV[$n-1]. A loop that tries to iterate over ARGV[0] won't find it. ENVIRONMENT
A2p uses no environment variables. AUTHOR
Larry Wall <larry@wall.org> FILES
SEE ALSO
perl The perl compiler/interpreter s2p sed to perl translator DIAGNOSTICS
BUGS
It would be possible to emulate awk's behavior in selecting string versus numeric operations at run time by inspection of the operands, but it would be gross and inefficient. Besides, a2p almost always guesses right. Storage for the awk syntax tree is currently static, and can run out. perl v5.14.2 2010-12-30 A2P(1)

Featured Tech Videos

All times are GMT -4. The time now is 03:29 PM.
Unix & Linux Forums Content Copyright 1993-2020. All Rights Reserved.
Privacy Policy