bash snippets

String function

len() in bash

$ var='Hello, World!'
$ echo "${#var}"
13

left() in bash

$ var='Hello, World!'
#${string:position:length}
$ echo "${var:0:5}"
Hello

right() in bash

$ var='Hello, World!'
#${string:position:length}
$ echo "${var:7:${#var}}"
World!
#or a litte more dynamic.. (the 6 most right chars)
echo "${var:$((${#var}-6)):${#var}}"
World!

mid() in bash

$ var='Hello, World!'
#${string:position:length}
$ echo "${var:4:4}"
o, W

string replace first in bash (substitute)

$ var='Hello, World!'
#${string/substring/replacement}
$ echo "${var/o/a}"
Hella, World!

string replace all in bash (substitute)

$ var='Hello, World!'
#${string//substring/replacement}
$ echo "${var//o/a}"
Hella, Warld!

Reference: http://www.netmess.org/tag/bash/

bash

~~LINKBACK~~

Discussion

Real name:

E-Mail:

Enter your comment. Wiki syntax is allowed:

Please fill all the letters into the box to prove you're human.

   ___   _____ __  __   ___   __  __
  / _ \ / ___/ \ \/ /  / _ \ / / / /
 / // // (_ /   \  /  / ___// /_/ / 
/____/ \___/    /_/  /_/    \____/

Please keep this field empty:

Subscribe to comments

Bernhard Brunner's Blog

Table of Contents

bash snippets

String function

len() in bash

left() in bash

right() in bash

mid() in bash

string replace first in bash (substitute)

string replace all in bash (substitute)

Discussion