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Full Discussion: Building JSON command with bash script
Top Forums Shell Programming and Scripting Building JSON command with bash script Post 303039757 by psysc0rpi0n on Monday 14th of October 2019 06:00:13 PM
Old 10-14-2019
Hello...

I've started to try something new for my script.
I'm trying to iterate over a JSON object, search for a specific value in all keys present in that object and finally, add those values.
Knowing that a specific key value can be accessed by

Code:
echo "$json_obj" | jq '.[0] .key'

I tried to use a variable to iterate through all keys and print their values

Code:
json_obj=(bitcoin-cli listunspent)
for i in "${#json_obj}";
do
echo "$json_obj" | jq '.[$i] .address'

But I get the following error which I can't fix.

Quote:
jq: error: i/0 is not defined at <top-level>, line 1:
.[$i] .address
jq: 1 compile error
I think this means that 'jq' cannot "expand" the $i variable so it returns that error, but I have no idea how to fix this!

Any help?

Edited;
I even tried this, but couldn't make it work either
Bash for Loop Over JSON Array Using jq
Last edited by psysc0rpi0n; 10-14-2019 at 07:09 PM..
 

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LEARN ABOUT MOJAVE

json_write

json::write(n)							       JSON							    json::write(n)

__________________________________________________________________________________________________________________________________________________

NAME

       json::write - JSON generation

SYNOPSIS

       package require Tcl  8.5

       package require json::write  ?1?

       ::json::write indented

       ::json::write indented flag

       ::json::write aligned

       ::json::write aligned flag

       ::json::write string s

       ::json::write array arg...

       ::json::write object key value...

_________________________________________________________________

DESCRIPTION

       The  json::write package provides a simple Tcl-only library for generation of text in the JSON http://www.json.org/ data exchange format as
       specified in RFC 4627 http://www.ietf.org/rfc/rfc4627.txt.

COMMANDS

       ::json::write indented
	      This method returns the current state of the indentation setting.

       ::json::write indented flag
	      This and the method aligned configure the layout of the JSON generated by the package.

	      If this flag is set (default) the package will break the generated JSON code across lines and  indent  it  according  to	its  inner
	      structure, with each key of an object on a separate line.

	      If this flag is not set, the whole JSON object will be written on a single line, with minimum spacing between all elements.

       ::json::write aligned
	      This method returns the current state of the alignment setting.

       ::json::write aligned flag
	      This and the method indented configure the layout of the JSON generated by the package.

	      If  this flag is set (default) the package ensures that the values for the keys in an object are vertically aligned with each other,
	      for a nice table effect. To make this work this also implies that indented is set as well.

	      If this flag is not set, the output is formatted as per the value of indented, without trying to align the values for object keys.

       ::json::write string s
	      This method takes the string s and returns it properly quoted for JSON as its result.

       ::json::write array arg...
	      This method takes a series of JSON formatted arguments and returns them as a properly formatted JSON array as its result.

       ::json::write object key value...
	      This method takes a series of key/value arguments, the values already formatted for JSON, and returns them as a  properly  formatted
	      JSON object as its result, with the keys formatted as JSON strings.

BUGS, IDEAS, FEEDBACK
       This  document, and the package it describes, will undoubtedly contain bugs and other problems.	Please report such in the category json of
       the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883].  Please also report any ideas for enhancements you  may  have  for
       either package and/or documentation.

KEYWORDS

       data exchange, exchange format, javascript, json

CATEGORY

       CGI programming

COPYRIGHT

       Copyright (c) 2009 Andreas Kupries <andreas_kupries@sourceforge.net>

json									1.0							    json::write(n)
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