JSON library basics in Ruby - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to load the JSON library.

Ruby

require '[1]'

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Ajson

Bnet/http

Cdate

Dfileutils

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'net/http' instead of 'json' to load the JSON library.

Forgetting to require any library before using JSON methods.

The JSON library in Ruby is loaded using require 'json'.

2fill in blank

medium

Complete the code to parse a JSON string into a Ruby hash.

Ruby

data = JSON.[1]('{"name":"Alice","age":30}')

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Adump

Bload

Cparse

Dgenerate

Attempts:

3 left

💡 Hint

Common Mistakes

Using JSON.generate which converts Ruby objects to JSON string.

Using JSON.dump which also converts Ruby objects to JSON string.

Use JSON.parse to convert a JSON string into a Ruby hash.

3fill in blank

hard

Fix the error in the code to convert a Ruby hash to a JSON string.

Ruby

json_string = JSON.[1]({name: "Bob", age: 25})

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Aparse

Bload

Cparse_json

Dgenerate

Attempts:

3 left

💡 Hint

Common Mistakes

Using JSON.parse which is for reading JSON strings, not creating them.

Using JSON.load which is for loading JSON from files or strings.

Use JSON.generate to convert Ruby objects into JSON strings.

4fill in blank

hard

Fill both blanks to create a JSON string from a Ruby hash and then parse it back.

Ruby

json_str = JSON.[1]({city: "Paris", country: "France"})
data = JSON.[2](json_str)

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Agenerate

Bparse

Cload

Ddump

Attempts:

3 left

💡 Hint

Common Mistakes

Using JSON.dump instead of generate for the first step.

Using JSON.load instead of parse for the second step.

First, use JSON.generate to create a JSON string from a Ruby hash. Then, use JSON.parse to convert the JSON string back into a Ruby hash.

5fill in blank

hard

Fill all three blanks to parse a JSON string, access a value, and generate a new JSON string.

Ruby

data = JSON.[1]('{"fruit":"apple","count":10}')
count = data[[2]]
new_json = JSON.[3]({fruit: "apple", count: count + 5})

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Aparse

B"count"

Cgenerate

D"fruit"

Attempts:

3 left

💡 Hint

Common Mistakes

Using symbols like :count instead of string keys like "count".

Using JSON.load instead of parse.

Using JSON.dump instead of generate.

Use JSON.parse to read the JSON string. Access the value with the key "count". Then use JSON.generate to create a new JSON string with the updated count.