JQ Tool

ubuntu: sudo apt update sudo apt list --upgradable sudo apt upgrade sudo apt install jq sudo apt --fix-broken install

windows: 1. Press ⊞ + R 2. Type in PowerShell run as administrator user 3. Press Ctrl + Shift + Enter 4. Choose Yes and Press Enter 5. chocolatey install jq

macos: brew update brew install jq

Knowledge

(curl -s 'https://raw.githubusercontent.com/datasets/geo-boundaries-world-110m/master/countries.geojson')|jq '.features |length'
(curl -s 'https://raw.githubusercontent.com/datasets/geo-boundaries-world-110m/master/countries.geojson')|jq '.features[0:1][0].properties |keys'
(curl -s 'https://raw.githubusercontent.com/datasets/geo-boundaries-world-110m/master/countries.geojson')|jq '{type: .type , features: .features}'

(curl -s 'https://raw.githubusercontent.com/datasets/geo-boundaries-world-110m/master/countries.geojson')|jq '[.features[].properties.pop_est]|min'
(curl -s 'https://raw.githubusercontent.com/datasets/geo-boundaries-world-110m/master/countries.geojson')|jq '[.features[].properties.pop_est]|max'
(curl -s 'https://raw.githubusercontent.com/datasets/geo-boundaries-world-110m/master/countries.geojson')|jq '[.features[].properties.economy]|unique'
(curl -s 'https://raw.githubusercontent.com/datasets/geo-boundaries-world-110m/master/countries.geojson')|jq '[.features[].properties.economy]|unique[]'

(curl -s 'https://raw.githubusercontent.com/datasets/geo-boundaries-world-110m/master/countries.geojson')|jq '[.features[].properties.pop_est]|sort'
(curl -s 'https://raw.githubusercontent.com/datasets/geo-boundaries-world-110m/master/countries.geojson')|jq '[.features[].properties.pop_est]|sort[]'|head
(curl -s 'https://raw.githubusercontent.com/datasets/geo-boundaries-world-110m/master/countries.geojson')|jq '[.features[].properties.pop_est]|sort[]'|tail

References

JQ Tool