helpers

Documentation

Overview

Package helpers provides helper functions for Advent of Code.

Index

• func Atoi(s string) int
• func AtoiSlice(s []string) []int
• func MakeRange(start, end int) []int
• func Map[T, V any](slice []T, fn func(T) V) []V
• func ParseId(s string) int
• func Product(s []int) int
• type Scanner
  • func NewScanner(filepath string) *Scanner

Functions

func Atoi

func Atoi(s string) int

Atoi is a wrapper around strconv.Atoi that calls log.Fatalf on error.

func AtoiSlice

func AtoiSlice(s []string) []int

AtoiSlice is a wrapper around Atoi that calls it for each string in the given slice. Deprecated: use Map(s, Atoi) instead.

func MakeRange

func MakeRange(start, end int) []int

MakeRange creates a slice containing integers from start to end inclusive. Returns an empty slice if start == end.

func Map

func Map[T, V any](slice []T, fn func(T) V) []V

Map applies the given function to each element in the given slice and returns a new slice with the results.

func ParseId

func ParseId(s string) int

ParseId parses a numerical id from a simple string, such as "Game 1" or "Card 2".

func Product

func Product(s []int) int

Product calculates the product of a slice of integers by multiplying all the elements together.

Types

type Scanner

type Scanner struct {
	*bufio.Scanner
	Close func() error
}

Scanner is a wrapper around bufio.Scanner that also has a Close method.

func NewScanner

func NewScanner(filepath string) *Scanner

NewScanner returns a new Scanner for the given filepath. If opening path fails log.Fatalf is called.