Gavin Wiggins

JSON parsing

Written on June 8, 2021

The JSON.jl package provides JSON parsing and printing capabilities in Julia. See the package's documentation for installation and usage information. The example below parses the vehicles.json file which contains

[
    {
        "make": "Ford",
        "model": "Mustang",
        "year": 1979
    },
    {
        "make": "Ford",
        "model": "Explorer",
        "year": 2001
    }
]

and the fruits.json file which contains

{
    "apples": 8,
    "oranges": 2,
    "berries": 19,
    "melons": 4
}

This example uses the JSON package to parse the above JSON files.

import JSON

# Parse vehicles.json which contains an array of objects
julia> v = JSON.parsefile("vehicles.json")

julia> v[1]["model"]
"Mustang"

julia> v[1]["year"]
1979

# Parse fruits.json which contains several name:value pairs
julia> f = JSON.parsefile("fruits.json")

julia> f["berries"]
19