Lesson 51 of 55
9 mins readCPAN & JSON Serialization (JSON::PP)
In Plain English
CPAN (Comprehensive Perl Archive Network) is Perl vast library ecosystem. Use the standard core module `JSON::PP` to serialize and deserialize data structures.
Deep Dive: How It Works
CPAN: Over 200,000 open-source modules installed via `cpanm Module::Name`.
JSON::PP (Core): Standard JSON module included with modern Perl installations.
encode_json($ref): Converts a Perl data reference into a UTF-8 JSON string.
decode_json($str): Parses a JSON string back into Perl nested hash/array references.
Core Rules to Remember
encode_json and decode_json: Seamless bidirectional serialization between Perl data structures and JSON.
Core Module: `JSON::PP` is available out-of-the-box on standard Perl environments.
Live Interactive Example
Hit Run Code to see it liveEncoding and Decoding JSON in Perl
Python 3.12
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Output Console
Click "Run Code" to view the rendered output.
How it works: JSON::PP seamlessly serialized the hash ref and parsed it back into memory.
Your Turn: Micro Challenge
No pressure! Edit the starter code below and test your solution with instant feedback.
Micro Exercise
Parse JSON String and Query Field
- Use `use JSON::PP;`
- Decode `my $raw = '{"role":"Admin","active":true}';` using `decode_json($raw)`.
- Print `"Role: " . $data->{role} . "\n"`.
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Sandbox Output
Click "Run & Check" to test your solution.
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