Currently there’s no compile-time optimisation; the values are padded to 8 bytes on x64. You can manually arrange structs to optimally utilise space; typically by going from larger types to smaller; 8 consecutive byte fields for example, will only use 8 bytes, but a single byte would be padded to an 8 byte alignment, consider … Read more
Remove the space after the comma before omitempty, then the error message will go away. bson:”password” json:”password,omitempty” (should be like this) In addition, this is a warning not an error. You should still be able to run your project.
To perform an, in effect, a realloc of a slice: a = append([]T(nil), a[:newSize]…) // Thanks to @Dijkstra for pointing out the missing ellipsis. If it does a copy of newSize elements to a new memory place or if it does an actual in place resize as in realloc(3) is at complete discretion of the … Read more
Below is an example of JWT decoding and verification. It uses both the jwt-go and jwk packages: package main import ( “errors” “fmt” “github.com/dgrijalva/jwt-go” “github.com/lestrrat-go/jwx/jwk” ) const token = `eyJhbGciOiJSUzI1NiIsImtpZCI6Ind5TXdLNEE2Q0w5UXcxMXVvZlZleVExMTlYeVgteHlreW1ra1h5Z1o1T00ifQ.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.OtVyCK0sE6Cuclg9VMD2AwLhqEyq2nv3a1bfxlzeS-bdu9KtYxcPSxJ6vxMcSSbMIIq9eEz9JFMU80zqgDPHBCjlOsC5SIPz7mm1Z3gCwq4zsFJ-2NIzYxA3p161ZRsPv_3bUyg9B_DPFyBoihgwWm6yrvrb4rmHXrDkjxpxCLPp3OeIpc_kb2t8r5HEQ5UBZPrsiScvuoVW13YwWpze59qBl_84n9xdmQ5pS7DklzkAVgqJT_NWBlb5uo6eW26HtJwHzss7xOIdQtcOtC1Gj3O82a55VJSQnsEEBeqG1ESb5Haq_hJgxYQnBssKydPCIxdZiye-0Ll9L8wWwpzwig` const jwksURL = `https://companyx.okta.com/oauth2/v1/keys` func getKey(token *jwt.Token) (interface{}, error) { // TODO: cache response so we don’t have to make a request every time // … Read more
struct is a keyword in Go. It is used to define struct types, which is a sequence of named elements. For example: type Person struct { Name string Age int } The struct{} is a struct type with zero elements. It is often used when no information is to be stored. It has the benefit … Read more
You will have to loop through the slice indeed. If the slice only contains integers, no need of ParseFloat, Atoi is sufficient. import “fmt” import “strconv” func main() { var t = []string{“1”, “2”, “3”} var t2 = []int{} for _, i := range t { j, err := strconv.Atoi(i) if err != nil { … Read more
Here’s a simple cross-platform version: func watchFile(filePath string) error { initialStat, err := os.Stat(filePath) if err != nil { return err } for { stat, err := os.Stat(filePath) if err != nil { return err } if stat.Size() != initialStat.Size() || stat.ModTime() != initialStat.ModTime() { break } time.Sleep(1 * time.Second) } return nil } And … Read more
Simply use rand.Float64() to get a random number in the range of [0..1), and you can map (project) that to the range of [min..max) like this: r := min + rand.Float64() * (max – min) And don’t create a new rand.Rand and / or rand.Source in your function, just create a global one or use … Read more
A simple option is to declare an interface with just the method you want to check for and then do a type assert against your type like; i, ok := myInstance.(InterfaceImplementingThatOneMethodIcareAbout) // inline iface declaration example i, ok = myInstance.(interface{F()}) You likely want to use the reflect package if you plan to do anything too … Read more
Since go 1.5, cross compiler has gotten pretty easy. Something like env GOOS=linux GOARCH=amd64 go build -v github.com/constabulary/gb/cmd/gb Refer to http://dave.cheney.net/2015/08/22/cross-compilation-with-go-1-5.