glinq

Go port of DotNet LINQ using generics introduced in Go 1.18

Currently implemented

• Where
• Select
• Range
• Foreach
• Min(By)
• Max(By)
• Average
• Sum
• First
• Last
• Skip(While)
• Take(While)
• Contains
• Any
• Join

(OrderBy And GroupBy will always access all items. For performance and ease of use reason I'll not implement them in IEnumerable way. Please use glinq/garray package instead)

Adapters:

• FromSlice

• FromMap

• ReadLines (wrapping bufio.NewScanner)

• sqlxq.Queryx (wrapping sqlx.Queryx)

• ToSlice

• ToMap

Also some similar utilities directly for slices in the glinq/garray package. These are more handful, without FromSlice/ToSlice conversion.

• Sort(Descending)
• SortBy(Descending)
• Map
• ToMap
• Filter
• Apply
• RemoveIf
• Contains
• (Last)IndexOf
• (Last)IndexWhere
• First, Last
• Concat
• ShallowCopy
• Sum
• Average
• GroupBy
• Count
• Reverse

Also a generic SyncMap type (should I separate it in another repository?)

• Load
• Store
• Range(E)
• Delete(If)
• LoadAndDelete
• LoadOrStore
• LoadOrNew
• LoadAndUpdate
• ToSlice
• Keys
• Len
• Clear
• PopAll

And more to come...

usage example

package main

import (
	"fmt"

	"github.com/szmcdull/glinq/garray"
	. "github.com/szmcdull/glinq/unsafe"
)

func main() {
	numbers := garray.Concat([]int{1, 2, 3, 4, 5}, []int{6, 7, 8, 9, 10})
	numbersToRemove := Where(FromSlice(numbers), func(x int) bool {
		return x > 5
	})
	Do(numbersToRemove, func(x int) { fmt.Printf(`%d `, x) }) // 6 7 8 9 10
	fmt.Println(``)
	numbers = ToSlice(Where(FromSlice(numbers), func(x int) bool {
		return !Contains(numbersToRemove, x)
	}))
	fmt.Println(Any(Where(FromSlice(numbers), func(x int) bool { return x > 5 }))) // false
	Do(FromSlice(numbers), func(x int) { fmt.Printf(`%d `, x) })                   // 1 2 3 4 5
	fmt.Println(``)

	// Sorting
	l := []int{8, 6, 4, 2, 5, 3, 1}

	garray.Sort(l)
	fmt.Printf("%v\n", l) // [1 2 3 4 5 6 8]

	l2 := []string{`the`, `lazy`, `dog`, `jumps`, `over`, `the`, `silver`, `fox`}
	garray.SortByDescending(l2, func(x string) byte { return x[len(x)-1] }) // sort descending by the last character
	fmt.Printf("%v\n", l2)                                                  // [lazy fox jumps silver over dog the the]
}

More examples:

• garray doc
• glinq_test.go
• garray_test.go