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Top Forums Shell Programming and Scripting ksh String Manipulation - removing variables from within a variable Post 303029822 by apmcd47 on Friday 1st of February 2019 08:42:47 AM
Old 02-01-2019
Quote:
Originally Posted by bakunin
@apmcd74:
Please notice that when you define a variable with:

Code:
cname=( word1 word2 word3 [...] )

you create an array, not a string. The parameter expansion ${cname/searchword/replacement} deals with strings though. i.e.

Code:
variable="++old++"
echo ${variable/old/NEW}
++NEW++

bakunin
My point was that you can do string manipulation per element, or for all elements in an array of strings, thus:
Code:
$ array=( john paul george ringo )
$ echo ${array[0]/h/}
jon
$ for btl in ${array[@]^}
> do
>   echo $btl
> done
John
Paul
George
Ringo
$

As I said, this works for bash and ksh93 on my Ubuntu systems; I haven't tried it out on ksh88.

Andrew
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PARSE_STR(3)								 1							      PARSE_STR(3)

parse_str - Parses the string into variables

SYNOPSIS
void parse_str (string $str, [array &$arr]) DESCRIPTION
Parses $str as if it were the query string passed via a URL and sets variables in the current scope. Note To get the current QUERY_STRING, you may use the variable $_SERVER['QUERY_STRING']. Also, you may want to read the section on vari- ables from external sources. Note The magic_quotes_gpc setting affects the output of this function, as parse_str(3) uses the same mechanism that PHP uses to populate the $_GET, $_POST, etc. variables. PARAMETERS
o $str - The input string. o $arr - If the second parameter $arr is present, variables are stored in this variable as array elements instead. RETURN VALUES
No value is returned. EXAMPLES
Example #1 Using parse_str(3) <?php $str = "first=value&arr[]=foo+bar&arr[]=baz"; parse_str($str); echo $first; // value echo $arr[0]; // foo bar echo $arr[1]; // baz parse_str($str, $output); echo $output['first']; // value echo $output['arr'][0]; // foo bar echo $output['arr'][1]; // baz ?> SEE ALSO
parse_url(3), pathinfo(3), http_build_query(3), get_magic_quotes_gpc(3), urldecode(3). PHP Documentation Group PARSE_STR(3)
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