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Showing content from https://github.com/Sterlingg/json-snatcher below:

Sterlingg/json-snatcher: Get the path to a JSON element in Emacs.

#json-snatcher.el

Say you're looking through a large JSON file, and see a value that you want to extract programmatically. This Emacs extension will allow you to snatch the path to this value.

Available on MELPA at http://melpa.milkbox.net/#/json-snatcher .

First include the package

Then add the following lines to your .emacs file, which sets a hotkey when editing JSON files in either js or js2 mode

(defun js-mode-bindings ()
"Sets a hotkey for using the json-snatcher plugin"
	 (when (string-match  "\\.json$" (buffer-name))
        (local-set-key (kbd "C-c C-g") 'jsons-print-path)))
(add-hook 'js-mode-hook 'js-mode-bindings)
(add-hook 'js2-mode-hook 'js-mode-bindings)

Here's an example of the plugin at work


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