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https://github.com/rekby/objwalker


https://github.com/rekby/objwalker

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README 

        
[![Go Reference](https://pkg.go.dev/badge/github.com/rekby/objwalker.svg)](https://pkg.go.dev/github.com/rekby/objwalker)

[![Coverage Status](https://coveralls.io/repos/github/rekby/objwalker/badge.svg?branch=master)](https://coveralls.io/github/rekby/objwalker?branch=master)

[![GoReportCard](https://goreportcard.com/badge/github.com/rekby/objwalker)](https://goreportcard.com/report/github.com/rekby/objwalker)

[![Mentioned in Awesome Go](https://awesome.re/mentioned-badge.svg)](https://github.com/avelino/awesome-go)



Deep walk by object with reflection. Walker.Walk(v interface{}) call callback function for v object, every field if it struct, every item for slice/array and every key and item for map object. It walk for object recursive and call callback for every object in tree.



It has loop protection - for not hang on cycled structured, protection can be disabled if need.



WalkInfo - struct, send as argument to callback function include:



* ```Value``` - reflection.Value object for read/manipulate with it.

* ```DataPointer``` - direct pointer to underly data, for example - pointer to bytes under string, ot pointer to data under slice. It is danger to manipulate it, but can userful for example for compare objects.

* ```Parent``` - parent of the value in travel tree

* and some other hints about Value



```golang

    package main



    import "github.com/rekby/objwalker"



    func main() {

		type S struct {

			Val1  int

			Slice []string

		}



		val := S{

			Val1:  2,

			Slice: []string{"hello", "world"},

		}

		_ = New(func(info *WalkInfo) error {

			fmt.Println(info.Value.Interface())

			return nil

		}).Walk(val)



		// Output:

		// {2 [hello world]}

		// 2

		// [hello world]

		// hello

		// world

	}

```