Golinq

Golinq provides support for language integrated query (LINQ) in Go, like C# LINQ.

• Generic LINQ, at least Go 1.18
• Support slice, array, map, channel, string and custom collections
• Easy to use, flexible to control
• Also support non-generic version

Installation

When used with Go modules, use the following import path:

go get github.com/leonests/golinq

Quickstart

Example 1: Find who has the most expensive book

import . "github.com/leonests/golinq"

type Person struct {
	Name         string
	Age          int
	Hobbies      []string
	LuckyNumbers []int
	BookPrices   map[string]float64
}
...

var persons []Person

res := FromSlice(persons).OrderBy(func(i int, p Person) any {
		return FromMap(p.BookPrices).OrderBy(func(s string, f float64) any {
			return f
		}).Last()
	}).ThenBy(func(i int, p Person) any { // if there are duplicates, ranking by lucky number
		return FromSlice(p.LuckyNumbers).OrderByDescending(func(i, n int) any {
			return n
		}).First()
	}).Last().Name

Example 2: Find who has a hobby of basketball

import . "github.com/leonests/golinq"

type Person struct {
	Name         string
	Age          int
	Hobbies      []string
	LuckyNumbers []int
	BookPrices   map[string]float64
}
...

var persons []Person

res := FromSlice(persons).Where(func(i int, p Person) bool {
		return FromSlice(p.Hobbies).Contains(func(i int, hobby string) bool {
			return hobby == "basketball"
		})
	}).Select(func(i int, p Person) any { 
		return p.Name 
	}).ToSlice()