How to select or make reference to, part of a field

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

How to make a loop to read the input from a file part by part?

Hi All, We've a VDI infrastructure in AWS (AWS workspaces) and we're planning to automate the process of provisioning workspaces. Instead of going to GUI console, and launching workspaces by selecting individual users is little time consuming. Thus, I want to create them in bunches from AWS CLI...

2. Shell Programming and Scripting

Using awk to select one field

Hi, I saw your post.. I have a dought in awk command... how to get the output from a file. i need a first column in etc/passwd file in a single column (in indivijual line)... i couldn't get with this command cat /etc/passwd | awk -F ":" '{printf $1}' Kindly help This thread was created...

3. Programming

Select and group by excluding one field

Dear community, I have a very simple query (on Oracle 11g) to select 3 fields: select field1, field2, field3, count(*) from table where... group by field1, field2, field3 having count(*) > 10;Now, what I need, is exclude "field3" from the "group by" since I only need field 1 and 2 to be...

4. Shell Programming and Scripting

Select a specific part of the string and print it

Hi all, I have a string that looks like: #!/bin/sh options="arguments: --user=alpha --group=beta --prefix=/usr/share --proxy-path=/proxy --proxy-tmp=/tmp --conf-path=/etc" My goal is to transform the string into an array, then for each key, if it starts with "--proxy" to print the string...

5. Shell Programming and Scripting

BASH: File name part to list reference problem.

I've made a habit of including a four-letter "tail" on image file names I download from the Web, so I can both match them with IPTC Transmission References of my own making and rename them later using either a GUI renamer or a script I've written myself. Now I want to automate the process of...

6. Shell Programming and Scripting

expr Field 1 + Field 2 Since when does 2 positives make a negative

Please help. I am adding 2 fields which are both positive and the result is negative. What am I missing? FileEHash=`expr ${Field1} + ${Field2}` >/dev/null Debug Results + expr 02100002 + 2009701914 EntryHash=2011801916 + expr 02100002 + 2146202044 FileEHash=-2146665250 How do...

7. Shell Programming and Scripting

regex to select last part of a path

Hi all, I am learning the use of regular expression and I would like to know which regex can be used to select only the last part of a directory path name. Something like: /dir1/dir2/dir2 and I want to select the last /dir2 where dir2 can be any kind of string. Thanks a lot for your help....

8. Shell Programming and Scripting

select a particular field

hi i have a file wwww-qqq.eee ksdklfsdf adm,as.d,am sdsdlasdjl sadsadasda wwww-qqq.eee ksdklfsdf adm,as.d,am sdsdlasdjl sadsadasda wwww-qqq.eee ksdklfsdf adm,as.d,am sdsdlasdjl sadsadasda wwww-qqq.eee ksdklfsdf adm,as.d,am sdsdlasdjl sadsadasda wwww-qqq.eee ksdklfsdf adm,as.d,am...

9. Shell Programming and Scripting

select last field from a file

hi everybody i would to select the last field of a file here as you can see i select the field number 8 y=`cat sortie2 | grep "^"| grep "starting"| awk '{ print $8}'` but line can containt more or less field in never know, i just know is the last one so i wondering to know if is...

10. Shell Programming and Scripting

Moving Part of a field to another field using AWK

Hi there, I have a comma seperated file with nine fields the fields are rerate: "numberTX",field2,field3,field4,field5..... I want to do this to the file reate: "field5TX",field2,field3,field4,field5 I know I can do this using AWK, but the thing giving me fits is that I...

LEARN ABOUT LINUX

lrange

lrange(n)						       Tcl Built-In Commands							 lrange(n)

__________________________________________________________________________________________________________________________________________________

NAME

       lrange - Return one or more adjacent elements from a list

SYNOPSIS

       lrange list first last
_________________________________________________________________

DESCRIPTION

       List must be a valid Tcl list.  This command will return a new list consisting of elements first through last, inclusive.  The index values |
       first and last are interpreted the same as index values for the command string index, supporting simple index arithmetic and indices  rela- |
       tive to the end of the list.  If first is less than zero, it is treated as if it were zero.  If last is greater than or equal to the number
       of elements in the list, then it is treated as if it were end.  If first is greater than last then an  empty  string  is  returned.   Note:
       "lrange list first first" does not always produce the same result as "lindex list first" (although it often does for simple fields that are
       not enclosed in braces); it does, however, produce exactly the same results as "list [lindex list first]"

EXAMPLES

       Selecting the first two elements:
	      % lrange {a b c d e} 0 1
	      a b

       Selecting the last three elements:
	      % lrange {a b c d e} end-2 end
	      c d e

       Selecting everything except the first and last element:
	      % lrange {a b c d e} 1 end-1
	      b c d

       Selecting a single element with lrange is not the same as doing so with lindex:
	      % set var {some {elements to} select}
	      some {elements to} select
	      % lindex $var 1
	      elements to
	      % lrange $var 1 1
	      {elements to}

SEE ALSO

       list(n), lappend(n), lindex(n), linsert(n), llength(n), lsearch(n), lset(n), lreplace(n), lsort(n), string(n)				   |

KEYWORDS

       element, list, range, sublist

Tcl									7.4								 lrange(n)

Shell Programming and Scripting