#maps code explainers

go

package config
 
import (
	"bufio"

Parsing INI files in Go

parsing state-machine error-handling

Intermediate 7 steps

java

public Map<Long, CustomerDto> indexByCustomerId(List<CustomerDto> customers) {
    return customers.stream()
            .collect(Collectors.toMap(
                    CustomerDto::getId,

Building maps from lists with Collectors.toMap

streams collectors maps

Intermediate 5 steps

go

package collection
 
func Deduplicate[T comparable](items []T) []T {
	seen := make(map[T]struct{}, len(items))

Generic deduplication in Go

generics deduplication maps

Intermediate 5 steps