parsing json using jq and bash arrays

jq_array

#!/usr/bin/env bash

## use this to parse json and extract what you need and place in BASH as array with unique elements, if you need this to be a single "string" remove the \n in the print statement below.
echo ' 
{
"devDependencies": { 
  "babel-cli": "^6.26.0",
  "babel-preset-env": "^1.7.0",
  "babel-plugin-lodash": "^3.3.4",
  "eslint": "^5.4.0",
  "eslint-config-airbnb-base": "^13.1.0",
  "eslint-plugin-import": "^2.14.0",
  "eslint-plugin-node": "^6.0.1",
  "eslint-plugin-promise": "^3.8.0",
  "jest": "^23.3.0",
  "jest-junit-reporter": "^1.1.0",
  "serverless-dynamodb-local": "^0.2.31",
  "serverless-kms-secrets": "^1.0.3",
  "serverless-offline": "^3.25.8",
  "serverless-pseudo-parameters": "^2.1.0"
},
"dependencies": { 
  "@log4js-node/logstash-http": "^1.0.0",
  "aws-sdk": "^2.277.1",
  "axios": "^0.18.0",
  "lodash": "^4.17.10",
  "log4js": "^3.0.5",
  "npm": "^6.4.0",
  "object-hash": "^1.3.0"
} 
}' > ./data.json

mapfile -t arr < <(jq -r '.devDependencies | keys[]' ./data.json)
printf "%s\n" ${arr[@]}