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Top Forums Shell Programming and Scripting Creating a pseudo-array in dash, (POSIX). Post 303028584 by Scrutinizer on Thursday 10th of January 2019 04:15:33 PM
Old 01-10-2019
How about a concept like this, mutable without eval .. :
Code:
#!/usr/local/bin/dash
set -- a b c
array() {
  _pos=$1
  _newval=$2
  _ARRAY= _i=-1 _val=
  shift 2
  for _val in "$@"
  do
    if [ $((_i+=1)) = $_pos ]; then
      _ARRAY="${_ARRAY}${_newval}
"
    else
      _ARRAY="${_ARRAY}${_val}
"
    fi
  done 
}

array 1 foo "$@"
oldIFS=$IFS
IFS="
"
set -- ${_ARRAY}

echo "Space as output field separator:
$@
"
echo "IFS as output field separator:
$*"

IFS=$oldIFS

Output:
Code:
Space as output field separator:
a foo c

IFS as output field separator:
a
foo
c


Last edited by Scrutinizer; 01-10-2019 at 05:55 PM..
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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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