Re: [go-nuts] Mismatched types work sometimes?
Cheers Rob, I'll certainly read that. On Mon, 11 Feb 2019 at 20:53, Rob Pike wrote: > You might find blog.golang.org/constants helpful. > > -rob > > > On Tue, Feb 12, 2019 at 5:04 AM Jamie Caldwell < > mr.jamie.caldw...@gmail.com> wrote: > >> Thanks for the help and quick response Tyler. >> >> On Mon, 11 Feb 2019 at 17:56, Tyler Compton wrote: >> >>> Constant expressions like 'A' or 3 or named constants like "const x = 7" >>> are what Go calls "untyped constants". The type of these constants are >>> determined by the context in which they're used. For example: >>> >>> const myConst = 3 >>> myFloat := 2.5 >>> fmt.Println(myFloat + myConst) >>> fmt.Println(myFloat + 3) >>> >>> Both of the above cases work because myConst and the literal 3 are >>> untyped constants that take on the type float64 automatically. >>> >>> You can also declare typed constants, which no longer have these type >>> inference properties. >>> >>> const myConst int = 3 >>> myFloat := 2.5 >>> fmt.Println(myFloat + myConst) // No longer works >>> >>> If you're curious about the details, I would check out the section of >>> the language spec on this: https://golang.org/ref/spec#Constants >>> >>> On Mon, Feb 11, 2019 at 9:37 AM Jamie Caldwell < >>> mr.jamie.caldw...@gmail.com> wrote: >>> Hello, Can you help? https://play.golang.org/p/XfJZ3h06p60 Why does 'A' work, when first assigning it to a variable doesn't? Thank you, Jamie. -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. >>> -- >> You received this message because you are subscribed to the Google Groups >> "golang-nuts" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to golang-nuts+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [go-nuts] Mismatched types work sometimes?
You might find blog.golang.org/constants helpful. -rob On Tue, Feb 12, 2019 at 5:04 AM Jamie Caldwell wrote: > Thanks for the help and quick response Tyler. > > On Mon, 11 Feb 2019 at 17:56, Tyler Compton wrote: > >> Constant expressions like 'A' or 3 or named constants like "const x = 7" >> are what Go calls "untyped constants". The type of these constants are >> determined by the context in which they're used. For example: >> >> const myConst = 3 >> myFloat := 2.5 >> fmt.Println(myFloat + myConst) >> fmt.Println(myFloat + 3) >> >> Both of the above cases work because myConst and the literal 3 are >> untyped constants that take on the type float64 automatically. >> >> You can also declare typed constants, which no longer have these type >> inference properties. >> >> const myConst int = 3 >> myFloat := 2.5 >> fmt.Println(myFloat + myConst) // No longer works >> >> If you're curious about the details, I would check out the section of the >> language spec on this: https://golang.org/ref/spec#Constants >> >> On Mon, Feb 11, 2019 at 9:37 AM Jamie Caldwell < >> mr.jamie.caldw...@gmail.com> wrote: >> >>> Hello, >>> >>> Can you help? >>> >>> https://play.golang.org/p/XfJZ3h06p60 >>> >>> Why does 'A' work, when first assigning it to a variable doesn't? >>> >>> Thank you, >>> Jamie. >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "golang-nuts" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to golang-nuts+unsubscr...@googlegroups.com. >>> For more options, visit https://groups.google.com/d/optout. >>> >> -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [go-nuts] Mismatched types work sometimes?
Thanks for the help and quick response Tyler. On Mon, 11 Feb 2019 at 17:56, Tyler Compton wrote: > Constant expressions like 'A' or 3 or named constants like "const x = 7" > are what Go calls "untyped constants". The type of these constants are > determined by the context in which they're used. For example: > > const myConst = 3 > myFloat := 2.5 > fmt.Println(myFloat + myConst) > fmt.Println(myFloat + 3) > > Both of the above cases work because myConst and the literal 3 are untyped > constants that take on the type float64 automatically. > > You can also declare typed constants, which no longer have these type > inference properties. > > const myConst int = 3 > myFloat := 2.5 > fmt.Println(myFloat + myConst) // No longer works > > If you're curious about the details, I would check out the section of the > language spec on this: https://golang.org/ref/spec#Constants > > On Mon, Feb 11, 2019 at 9:37 AM Jamie Caldwell < > mr.jamie.caldw...@gmail.com> wrote: > >> Hello, >> >> Can you help? >> >> https://play.golang.org/p/XfJZ3h06p60 >> >> Why does 'A' work, when first assigning it to a variable doesn't? >> >> Thank you, >> Jamie. >> >> -- >> You received this message because you are subscribed to the Google Groups >> "golang-nuts" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to golang-nuts+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [go-nuts] Mismatched types work sometimes?
Constant expressions like 'A' or 3 or named constants like "const x = 7" are what Go calls "untyped constants". The type of these constants are determined by the context in which they're used. For example: const myConst = 3 myFloat := 2.5 fmt.Println(myFloat + myConst) fmt.Println(myFloat + 3) Both of the above cases work because myConst and the literal 3 are untyped constants that take on the type float64 automatically. You can also declare typed constants, which no longer have these type inference properties. const myConst int = 3 myFloat := 2.5 fmt.Println(myFloat + myConst) // No longer works If you're curious about the details, I would check out the section of the language spec on this: https://golang.org/ref/spec#Constants On Mon, Feb 11, 2019 at 9:37 AM Jamie Caldwell wrote: > Hello, > > Can you help? > > https://play.golang.org/p/XfJZ3h06p60 > > Why does 'A' work, when first assigning it to a variable doesn't? > > Thank you, > Jamie. > > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[go-nuts] Mismatched types work sometimes?
Hello, Can you help? https://play.golang.org/p/XfJZ3h06p60 Why does 'A' work, when first assigning it to a variable doesn't? Thank you, Jamie. -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
