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- Short: Alternative to strip a given word from a string.
- Author: Agneta Nord <agneta.nord@swipnet.se>
- Version: 1.0 (7.12.99)
-
- Name:
-
- The name derivates from "Strip A Word".
-
- Purpose:
-
- I wrote this to simplify scripting while I was dealing with
- logfiles. Usage is within scripts. 'saw' deals with arguments
- only. I can see no relevance in interactive use.
-
- If You don't do scripts, You probably don't find any use in
- this "utility".
-
- Template:
-
- saw <word_number> <string>
-
- 'word_number' is a number from 1 and up to 999.
-
- 'string' is the literal string or a variable that contains
- a number of words from which a particular word is searched.
-
- Results:
-
- The word is output to stdout and can be redirected to a file
- or used to set a variable. A trailing newline is not appended
- intentionally. I didn't want that as it can be used to extract
- a word that is to be joined with other files where a newline
- is not desired. If You need a newline You redirect the output
- to a variable and use ECHO which append a newline character
- for You.
-
- If You point to a word beyond the list, a word_number that is
- higher than the number of words, 'saw' exits with a warn and
- give no output. See examples below for usage.
-
- If word_number is not a numeric positive integer You'll have
- a WARNing and not a FAIL.
-
- Examples:
-
- ---------
-
- The ENV:vehicles contains "car train boat bike":
-
- # saw 3 $vehicles >vehicle
- # more vehicle
- boat
- #
-
- ---------
-
- The same contents in ENV:vehicles:
-
- # saw 3 $vehicles
- boat#
-
- ---------
-
- Example, fictive logfile excerpt:
-
- 6.12.99 1:15:32 pppd: Local IP 123.234.3.56 recieved
-
- If You want the IP adress for insertion in an html document,
- in a script You could write something like:
-
- set ipstring `search <logfile> "Local IP" nonum`
- saw 6 $ipstring >ip ; from the example above -> 192.168.1.15
- if warn ; something went wrong
- quit ; so we bail out
- endif
- join head ip tail to myaddress.html
- unset ipstring
-
- ---------
-
- 'saw' could also be used to test for a number of words in a string:
-
- set fruit banana apple orange pineapple pear
- saw 6 $fruit >nil:
- if warn
- echo "There is less than 6 fruits."
- quit
- endif
- echo "There is 6 fruits or more."
-
- ---------
-
- So what? I use "ECHO START=32 LEN=12 NOLINE".
-
- Well, in some cases the length of some words are not static
- and tests which could be tedious and error prone would have
- to be performed by the script.
-
-