On Tue, Jun 22, 2021 at 5:40 PM Vaibhav Maurya <vaibhav.se...@gmail.com> wrote:
> https://golang.org/ref/spec#Composite_literals > > following is the search string for CTRL + F > // vowels[ch] is true if ch is a vowel \ > > Following declaration and initialization is confusing. > vowels := [128]bool{'a': true, 'e': true, 'i': true, 'o': true, 'u': true, > 'y': true} > > Here one can see the vowels is an array. Where in the array initialization > syntax, there is a key value pair. I believe bool is the primitive type, so > the array values should be either true or false. > Why there are key value pair separated by colon in the initialization. The key in, for example 'a': true is 'a'. 'a' is an untyped integer literal havine value 0x61, ie. 97. So the example key is the same as 97: true. The meaning of such key/pair in the initializer of a [128]bool typed value is to set index 97 to true. This is specified, quoting from the link you provided, as: """" The key is interpreted as a field name for struct literals, an index for array and slice literals, and a key for map literals. """" -- 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. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/CAA40n-VJOVMJ1ZguEyNjK%3DSpq4%2B0HOk%3DTC-oqW15EgSg8UgryQ%40mail.gmail.com.
