Is there a simpler way to create an array in Go

Question

I am trying to learn Go, and I am reimplementing something I have written in Python as a project. I am trying to send some basic commands to a Bluetooth LE device. Ultimately, I want a Characteristic I can write to, and it seems in order to do that with the BLE library, I first need to get a connection, find the services, filtering to the one of interest, and then once I have the Service, get its characteristics. That's all fine.

I am wondering if this is the best way of creating the filter array for getting the service of interest though:

var service_filter []ble.UUID

//s_uuid := ble.MustParse("00001820-0000-1000-8000-00805f9b34fb")
s_uuid := ble.MustParse("1820")
service_filter = append(service_filter, s_uuid)

services, err := client.DiscoverServices(service_filter)
for _, s := range services {
    fmt.Printf("%s\n", s.UUID)
}

I am specifically asking about "service_filter". In other languages, I might do the following:

services, err := client.DiscoverServices([ ble.MustParse("1820") ])
for _, s := range services {
    fmt.Printf("%s\n", s.UUID)
}

Please take the Tour of Go. It's very good, and covers all the basics of langauge syntax, including slice literals. — Adrian
– Adrian, Commented Nov 23, 2021 at 16:14

erik258 · Accepted Answer · 2021-11-23 16:37:26Z

4

Try this

services, err := client.DiscoverServices([]ble.UUID{ble.MustParse("1820")})
for _, s := range services {
    fmt.Printf("%s\n", s.UUID)
}

Initializing Slice in Go

var a = []int{1,2,3}

edited Nov 23, 2021 at 16:37

erik258

16.5k2 gold badges32 silver badges47 bronze badges

answered Nov 23, 2021 at 16:03

David Yappeter

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