Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl Monk, Perl Meditation
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

I have written a perl script to edit the a json file.

I need to check if cp is 10000 and set custcap to 99999 if so. If the cp is not equal to 10000, just exit out of the file without making changes.

The script works as expected. It makes the necessary changes and saves the files.

however after the changes,the order of the parameters in JSON file changes>

I read the json spec, My understanding is json is unordered.

can some one help me out with preserving the order

config file

{ "version": "15320029", "global": { "ap": { "log": "info", "hyd": { "log": "info", "qo": false } }, "cus": [ { **"cp": "10000"**, "ser": "XYZ", "usesr": false, "services": { "acc": { "ips": { "usesr": false } } }, "q": { "policy": "CAP", **"custcap": 3000000** } }, { "cp": "10441", "ser": "abc", "usesr": false, "services": { "acc": { "ips": { "usesr": false } } }, "q": { "policy": "CAP", "custcap": 3000000 } } ] }
#!/usr/bin/perl use strict; use warnings; use JSON; my $json; { open my $fh, "<", "cfg.txt" or die("Can't open file \"/Users/hsivaram/cfg.txt\": $!\n"); local $/; $json = <$fh>; } my $data = decode_json($json); for my $cus (@{ $data->{global}{cus} }) { $cus->{q}{custcap} = 99999 if $cus->{cp} == 10000; } $json = JSON->new->utf8->pretty->encode($data); { open my $fh, ">" ,"cfg.txt" or die("Can't open file \"/Users/hsivaram/cfg.txt\": $!\n"); local $/; print $fh $json; }

After script execution the order of the file changes. is there a way to preserve the order ?


In reply to Preserve the order in JSON by user786

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others perusing the Monastery: (6)
    As of 2021-03-01 23:31 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?
      My favorite kind of desktop background is:











      Results (28 votes). Check out past polls.

      Notices?