Skip to main content

UNIX : Awk example to strip character of word


The below program will read all the first character of a line and join it together.



#!/bin/bash

F="file.txt"

for i in $(cat $F)
do
          echo $i | awk -F"_" 'BEGIN{ st="" } 
          { for( i=1; i<=NF; i++ )
          { st=st""toupper(substr($i,1,1)) }
          }
           END{ print st }'
done

The program will read a file with "_"(underscore) delimited content. Then all the first character of the line will be striped and joined together.

Eg:

File name : Word_File_Created_by_John"

Output : WFCBJ

Note then small case is also turned to upper case.

The below awk functions are used in this program

toupper() - This will convert the string to upper case
substr() - This will strip the specific character(s) from the string




Labels:

Comments

Post a Comment

Popular posts from this blog

Pokemon Go download link

Pokemon go has become the buzz word in tech industry now. Nintendo, the Japanese video game company are the creates of this game. Its first of it kind to integrate a game with augmented reality , so people has to go out to real world with there android or iPhone to catch em all . You can download  Pokemon go  from this link. 
2 comments
Read more

UNIX : How to ignore lines with certain names

Sometimes we need to ignore multiple lines with certain words and get the list out of the file. usually it will be a log file to read . The below grep command can be used to ignore multiple words present in a text file. Lets say the file contain $ cat list.txt apple orange apple banana papaya Now we need to ignore line with orange , banana and papaya . So we can use the below grep command. $ cat list.txt | grep -Ev "orange|banana|papaya" apple apple It will ignore lines with the words in -v part of grep.
Post a Comment
Read more