Regular expression to convert string another string powershell

Question

I have a string as given below

$mystring="t={p:1,q:2,r:3}"

i want to convert this string to a following string

"t={'p':'1','q':'2','r':'3'}"

How can i do this in powershell

Code i tried is given below

$list=[System.Text.RegularExpressions.Regex]::Matches($mystring,"[{:,]").Value
foreach($dicitem in $diclist)
{
$dic=$dic.Replace("$dicitem","$dicitem'")
}
$list=[System.Text.RegularExpressions.Regex]::Matches($dic,"[}:,]").Value
foreach($dicitem in $diclist)
{
$dic=$dic.Replace("$dicitem","'$dicitem")
}

But iam not getting the result as expected,is there any other better way to do this

mjolinor · Accepted Answer · 2014-04-14 10:33:47Z

2

The -replace operator is much easier. This solution uses backreferences instead of the -f format operator.

Edit: misread the question originally (missed that the letters needed to be quoted, too. Update solution:

$mystring="t={p:1,q:2,r:3}"
$mystring -replace '([^{,]+):([^,}])+',"'`$1':'`$2'"

t={'p':'1','q':'2','r':'3'}

edited Apr 14, 2014 at 10:33

answered Apr 11, 2014 at 11:39

mjolinor

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Comments

Raf · Accepted Answer · 2014-04-11 11:20:06Z

2

$mystring -replace '(?<={.*)([a-z])|\d',("'{0}'" -f '$0')

answered Apr 11, 2014 at 11:20

Raf

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CB. · Accepted Answer · 2014-04-11 11:15:17Z

1

try this way:

$mystring -replace '(?<={.*)([^:,}])', ("'{0}'" -f '$1')

answered Apr 11, 2014 at 11:15

CB.

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Comments

Sabuj Hassan · Accepted Answer · 2014-04-11 11:14:46Z

Do a regex replace. Search for Regex:

(?<!\})(?!.*\{)

And replace with single quote '

Explanation of the regex:

NODE                     EXPLANATION
--------------------------------------------------------------------------------
  (?<!                     look behind to see if there is not:
--------------------------------------------------------------------------------
    \}                       '}'
--------------------------------------------------------------------------------
  )                        end of look-behind
--------------------------------------------------------------------------------
  (?!                      look ahead to see if there is not:
--------------------------------------------------------------------------------
    .*                       any character except \n (0 or more times
                             (matching the most amount possible))
--------------------------------------------------------------------------------
    \{                       '{'
--------------------------------------------------------------------------------
  )                        end of look-ahead

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