null alternatives and similar packages
Based on the "Data Structures" category.
Alternatively, view null alternatives based on common mentions on social networks and blogs.
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gocache
A complete Go cache library with mutiple stores (memory, memcache, redis, ...), chainable, loadable, metrics cache and more. -
hyperloglog
HyperLogLog implementation with Sparse, LogLog-Beta bias correction and TailCut space reduction. -
merkletree
Implementation of a merkle tree providing an efficient and secure verification of the contents of data structures. -
Bloomfilter
Face-meltingly fast, thread-safe, marshalable, unionable, probability- and optimal-size-calculating Bloom filter in go -
hilbert
Go package for mapping values to and from space-filling curves, such as Hilbert and Peano curves. -
gostl
Data structure and algorithm library for go, designed to provide functions similar to C++ STL. -
remember-go
A universal interface for caching slow database queries (backed by redis, memcached, ristretto, or in-memory). -
count-min-log
A Go implementation Count-Min-Log sketch: Approximately counting with approximate counters (Like Count-Min sketch but using less memory). -
nan
Zero allocation Nullable structures in one library with handy conversion functions, marshallers and unmarshallers.
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README
Nullable Go types
Description
This package provides nullable Go types for bool, float64, int64, int32, string and time.Time replacing sql.NullString, sql.NullInt64, ... that can be marshalled/unmarshalled to/from JSON.
Installation
To install "null", run go get within your project:
go get github.com/emvi/null
Note that from 1.3 on "null" requires Go version 1.13 or newer.
Usage
Here is a short example demonstrating the string type. The other types (int64, float64 and bool) work in the same manner.
package main
import (
"encoding/json"
"database/sql"
"fmt"
"github.com/emvi/null"
)
type NullableString struct {
Value null.String `json:"value"`
}
func main() {
str := NullableString{null.NewString("nullable string", true)}
// or long version: str := NullableString{null.String{sql.NullString{String: "nullable string", Valid: true}}}
data, _ := json.Marshal(str)
fmt.Println(string(data)) // -> {"value": "nullable"}
str.SetNil() // use str.SetValid("value") to set a value again
data, _ = json.Marshal(str)
fmt.Println(string(data)) // -> {"value": null}
}
Contribute
[See CONTRIBUTING.md](CONTRIBUTING.md)
License
MIT
*Note that all licence references and agreements mentioned in the null README section above
are relevant to that project's source code only.