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#php
#kotlin
#bash
#go
#sql
#rust
#typescript
#html
#java
#python
#files
#utils
#strings
#http
#concurrency
#async
#json
#arrays
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#types
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#format
Go
JSON Marshal / Unmarshal
`encoding/json` is the standard library JSON parser. `Marshal` produces compact JSON; `MarshalIndent` produces pretty-printed. `Unmarshal` decodes into a typed value (struct, map, or any).
@admin
Bash
Extract JSON Field with jq
jq is the de-facto JSON tool. Pipe any JSON in, get a parsed/filtered/reshaped result out. Indispensable in deploy scripts that consume API output.
Bash
Pretty-Print JSON from cURL
Pipe API responses through jq for syntax-colored, indented output. Also great for extracting specific fields without writing a parser.
Go
JSON API Endpoint
Decode an incoming JSON body into a typed struct, do work, encode a JSON response. The whole roundtrip is ~20 lines of standard library.
Kotlin
Ktor Server — JSON API with kotlinx.serialization
Install `ContentNegotiation` + `Json` plugin and you get typed (de)serialization for every route. Decode request bodies into data classes; respond with data classes.
Java
Jackson — Basic ObjectMapper
`com.fasterxml.jackson.databind.ObjectMapper` is the JSON standard for Java. Construct once (it's expensive + thread-safe) and reuse for every serialization in your app.
Java
Jackson — Annotations (rename, ignore, etc)
Field-level annotations let you map between snake_case JSON and camelCase Java, skip nulls, never serialize secrets, set defaults on missing fields.
Kotlin
kotlinx.serialization — JSON Basics
Compile-time code generation for JSON serialization. Annotate `@Serializable` on a data class; `Json.encodeToString` and `Json.decodeFromString` are typed.
SQL
JSONB Columns (PostgreSQL)
`jsonb` stores binary-optimized JSON. Index sub-fields with GIN for fast containment queries. Most-used operators: `->` (get field), `->>` (get as text), `@>` (contains), `?` (key exists).
PHP
JSON Structured Logger
Append a single JSON object per line to a log file. Easy to grep and to ship into Datadog / Loki / CloudWatch later without re-parsing.
Rust
reqwest GET + JSON Deserialize
`reqwest` is the standard HTTP client. Combined with serde, you can fetch and parse a JSON API response into a typed struct in three lines.
Java
HttpClient — POST JSON
POST a JSON body with `HttpRequest.BodyPublishers.ofString` + the right Content-Type. Pair with Jackson / Gson to serialize objects to JSON.
Rust
reqwest POST JSON
Send a JSON body by calling `.json(&value)` — serde handles serialization. Read the response body or status code afterwards.
PHP
cURL POST JSON
Post a JSON body with the right Content-Type header and parse the response. Returns the decoded body or throws on a non-2xx response.
Kotlin
Ktor Client — POST JSON with Serialization
Combine Ktor + kotlinx.serialization: register the JSON plugin, declare `@Serializable` data classes, the client (de)serializes automatically.
TypeScript
JSON POST Helper
Companion to `http<T>` — POST a JSON body and parse a JSON response, both typed. Handles the boilerplate Content-Type header and JSON serialization.
Go
HTTP POST JSON Body
Build a request with `http.NewRequestWithContext`, set headers, send via your client. The context plumbing is what lets callers cancel mid-request.