Go – Code Snippets

Category: Utilities

tags:

Error Handling Errors

Wrap and Unwrap Errors in Go

Wrap errors with fmt.Errorf %w and inspect with errors.Is / As.

Author: chris

Language: Go

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Category: Database

tags:

Database Tag Postgres Sql

Connect to PostgreSQL in Go

Open a database/sql handle to Postgres and query rows.

Author: chris

Language: Go

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Category: Web Development

tags:

Http Server Web

Minimal HTTP Server in Go

Spin up a net/http server with a JSON-returning handler.

Author: chris

Language: Go

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Category: CLI & System

tags:

Args Cli Flags

Parse Flags with the flag Package

Parse typed CLI flags using the stdlib flag package.

Author: chris

Language: Go

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Category: Concurrency

tags:

Sync Waitgroup

Synchronize with WaitGroup

Wait for a batch of goroutines using sync.WaitGroup.

Author: chris

Language: Go

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Category: Concurrency

tags:

Channels Concurrency Tag Goroutines

Goroutines and Channels

Fan-in pattern: workers push results onto a channel.

Author: chris

Language: Go

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Category: File I/O

tags:

File Recursion Walk

Walk a Directory Tree with filepath.WalkDir

Recursively walk a path with filepath.WalkDir (Go 1.16+).

Author: chris

Language: Go

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Category: Sorting & Data Structures

tags:

Slices Sort

Sort Slice of Structs in Go

Sort a slice of structs with sort.Slice and a less func.

Author: chris

Language: Go

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Category: Strings & Text

tags:

Capture Regex

Regex FindAllString in Go

Compile a regex and pull every match out of a string.

Author: chris

Language: Go

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Category: Cryptography & Hashing

tags:

Digest Hash Sha256

SHA256 Hash in Go

Compute a SHA256 digest with the crypto/sha256 stdlib.

Author: chris

Language: Go

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