85 lines
2.4 KiB
Markdown
85 lines
2.4 KiB
Markdown
# geocache [](https://godoc.org/github.com/melihmucuk/geocache) [](https://goreportcard.com/report/melihmucuk/geocache) [](https://travis-ci.org/melihmucuk/geocache)
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geocache is an in-memory cache that is suitable for geolocation based applications. It uses geolocation as a key for storing items. You can specify range on initialization and thats it! You can store any object, it uses interface.
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### Installation
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`go get github.com/melihmucuk/geocache`
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### Usage
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```go
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import (
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"fmt"
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"time"
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"github.com/melihmucuk/geocache"
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)
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func main() {
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c, err := geocache.NewCache(5*time.Minute, 30*time.Second, geocache.WithIn1KM)
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geoPoint := geocache.GeoPoint{Latitude: 40.9887, Longitude: 28.7817}
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if err != nil {
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fmt.Println("Error: ", err.Error())
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} else {
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c.Set(geoPoint, "helloooo", 2*time.Minute)
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v1, ok1 := c.Get(geocache.GeoPoint{Latitude: 41.2, Longitude: 29.3})
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v2, ok2 := c.Get(geocache.GeoPoint{Latitude: 41.2142, Longitude: 29.4234})
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v3, ok3 := c.Get(geocache.GeoPoint{Latitude: 40.9858, Longitude: 28.7852})
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v4, ok4 := c.Get(geocache.GeoPoint{Latitude: 40.9827, Longitude: 28.7883})
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fmt.Println(v1, ok1)
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fmt.Println(v2, ok2)
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fmt.Println(v3, ok3)
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fmt.Println(v4, ok4)
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}
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}
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```
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outputs:
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```
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<nil>, false
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<nil>, false
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helloooo, true
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helloooo, true
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```
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### Information
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You can specify 8 different range. More info can be found [here](http://gis.stackexchange.com/questions/8650/how-to-measure-the-accuracy-of-latitude-and-longitude).
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* `WithIn11KM`
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The first decimal place is worth up to 11.1 km `eg: 41.3, 29.6`
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* `WithIn1KM`
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The second decimal place is worth up to 1.1 km `eg: 41.36, 29.63`
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* `WithIn110M`
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The third decimal place is worth up to 110 m `eg: 41.367, 29.631`
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* `WithIn11M`
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The fourth decimal place is worth up to 11 m `eg: 41.3674, 29.6316`
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* `WithIn1M`
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The fifth decimal place is worth up to 1.1 m `eg: 41.36742, 29.63168`
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* `WithIn11CM`
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The sixth decimal place is worth up to 0.11 m `eg: 41.367421, 29.631689`
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* `WithIn11MM`
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The seventh decimal place is worth up to 11 mm `eg: 41.3674211, 29.6316893`
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* `WithIn1MM`
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The eighth decimal place is worth up to 1.1 mm `eg: 41.36742115, 29.63168932`
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