Go maps in action

Official guide to map declaration, initialization, zero values, nested use, and iteration semantics.

• Author: Andrew Gerrand
• Authority: primary
• Kind: blog
• URL: https://go.dev/blog/maps

What it covers

• map declaration and initialization
• nil map behavior
• iteration and practical usage patterns

Why authoritative

Official Go blog guidance on how maps are intended to be used.

Use when

• how should I use maps in Go
• what are the semantics of nil maps in Go
• can I rely on Go map iteration order

Keywords

• maps, hash table, nil map, iteration order, map usage

Used by

• maps
• map-internals-and-performance