# Steem Developer Portal

### RB: Edit Content Patching

Full, runnable src of Edit Content Patching can be downloaded as part of the RB tutorials repository.

title: How to edit a Post position: 5 exclude: true layout: main-script description: Patching changes to a post on Steem. main_script: tutorials-ruby/edit_content_patching.rb main_type: ruby main_script_anchor: Script —

### Intro

This tutorial will show a technique for efficiently editing a post by only broadcasting changes to the post body.

### Script

This script will take an existing post and append a new line by broadcasting a `comment` operation containing a `diff` instruction. This instruction will tell the blockchain to append new content to the end of the `body` of the original comment.

Because this is a live example, we set `broadcast` to `false` so that it only runs if you modify the example and set `broadcast` to `true`.

As stated earlier, you will need to change `broadcast` to `true`. You can also set other values to test this script on other post:

- `wif` - The posting key of the author.
- `author` - Name of the account that wrote the post we’re modifying.
- `title` - Title of the post.
- `permlink` - Leave this if the `permlink` is derived from the title or set it to the original `permlink` if you want to modify the title independently from the `permlink`.

### To Run

First, set up your workstation using the steps provided in Getting Started. Then you can create and execute the script (or clone from this repository):

    git clone git@github.com:steemit/devportal-tutorials-rb.git
    cd devportal-tutorials-rb/tutorials/12_edit_content_patching
    bundle install
    ruby edit_content_patching.rb

### Example Output

    Changes:
    @@ -26,8 +26,26 @@
      edited)
    +%0AAppended content.
    {
      "jsonrpc": "2.0",
      "result": {
        "id": "f327acc1c51d907a9ba9bfac70e6fc9e99ab2865",
        "block_num": 23035803,
        "trx_num": 0,
        "expired": false
      },
      "id": 1
    }