You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
62 lines
1.4 KiB
62 lines
1.4 KiB
2 years ago
|
# hashstructure
|
||
|
|
|
||
|
|
hashstructure is a Go library for creating a unique hash value
|
||
|
|
for arbitrary values in Go.
|
||
|
|
|
||
|
|
This can be used to key values in a hash (for use in a map, set, etc.)
|
||
|
|
that are complex. The most common use case is comparing two values without
|
||
|
|
sending data across the network, caching values locally (de-dup), and so on.
|
||
|
|
|
||
|
|
## Features
|
||
|
|
|
||
|
|
* Hash any arbitrary Go value, including complex types.
|
||
|
|
|
||
|
|
* Tag a struct field to ignore it and not affect the hash value.
|
||
|
|
|
||
|
|
* Tag a slice type struct field to treat it as a set where ordering
|
||
|
|
doesn't affect the hash code but the field itself is still taken into
|
||
|
|
account to create the hash value.
|
||
|
|
|
||
|
|
* Optionally specify a custom hash function to optimize for speed, collision
|
||
|
|
avoidance for your data set, etc.
|
||
|
|
|
||
|
|
## Installation
|
||
|
|
|
||
|
|
Standard `go get`:
|
||
|
|
|
||
|
|
```
|
||
|
|
$ go get github.com/mitchellh/hashstructure
|
||
|
|
```
|
||
|
|
|
||
|
|
## Usage & Example
|
||
|
|
|
||
|
|
For usage and examples see the [Godoc](http://godoc.org/github.com/mitchellh/hashstructure).
|
||
|
|
|
||
|
|
A quick code example is shown below:
|
||
|
|
|
||
|
|
|
||
|
|
type ComplexStruct struct {
|
||
|
|
Name string
|
||
|
|
Age uint
|
||
|
|
Metadata map[string]interface{}
|
||
|
|
}
|
||
|
|
|
||
|
|
v := ComplexStruct{
|
||
|
|
Name: "mitchellh",
|
||
|
|
Age: 64,
|
||
|
|
Metadata: map[string]interface{}{
|
||
|
|
"car": true,
|
||
|
|
"location": "California",
|
||
|
|
"siblings": []string{"Bob", "John"},
|
||
|
|
},
|
||
|
|
}
|
||
|
|
|
||
|
|
hash, err := hashstructure.Hash(v, nil)
|
||
|
|
if err != nil {
|
||
|
|
panic(err)
|
||
|
|
}
|
||
|
|
|
||
|
|
fmt.Printf("%d", hash)
|
||
|
|
// Output:
|
||
|
|
// 2307517237273902113
|