Default all values in a new slice to a custom value GoLang

Question

Is it possible to define a custom default value when creating a slice in Go ?

For example

manyFlags := make([]int, 10)
manyEmptyFlags := make([]int, 10, 10)
someEmptyFlags := make([]int, 5, 10)

manyFlags would create an empty slice with capacity 10

manyEmptyFlags would create a slice with length 10 but all values are Zero

manyFlags would create a slice with capacity 10 and length 5 with Zero for the first 5 values

Would it be possible to have a set default value like 1 or -1 ?

I can loop through and set the value or change my program to treat zero as the default value but is there really no other way ?

Does this answer your question? [Is it possible to initialize slice with specific values?](https://stackoverflow.com/questions/39984957/is-it-possible-to-initialize-slice-with-specific-values) — Puneet Singh, May 15 '20 at 12:19
Write a helper function that does this for you. See [Is there analog of memset in go?](https://stackoverflow.com/questions/30614165/is-there-analog-of-memset-in-go/30614594#30614594) — icza, May 15 '20 at 13:12

Volker · Accepted Answer · 2020-05-15T12:25:21.290

14

Would it be possible to have a set default value like 1 or -1 ?

No.

I can loop through and set the value or change my program to treat zero as the default value but is there really no other way ?

Yes. (there is no other way).

General rule of thumb: There is no magic in Go.

edited May 15 '20 at 12:25

answered May 15 '20 at 12:15

Volker

1 Answers1