I started learning go and I want to implement some algorithm. I can iterate over strings and then get chars, but these chars are Unicode numbers.
How to concatenate chars into strings in go? Do you have some reference? I was unable to find anything about primitives in official page.
Iterating over strings using range gives you Unicode characters while
iterating over a string using an index gives you bytes. See the spec for
runes and strings as well as their conversions.
As The New Idiot mentioned, strings can be concatenated using the +
operator.
The conversion from character to string is two-fold. You can convert
a byte (or byte sequence) to a string:
string(byte('A'))
or you can convert a rune (or rune sequence) to a string:
string(rune('µ'))
The difference is that runes represent Unicode characters while bytes represent 8 bit values.
But all of this is mentioned in the respective sections of the spec I linked above. It's quite easy to understand, you should definitely read it.
rangeyou can convert a []rune to a string directly:
string([]rune{'h', 'e', 'l', 'l', 'o', '☃'})
http://play.golang.org/p/P9vKXlo47c
as for reference, it's in the Conversions section of the Go spec, in the section titled "Conversions to and from a string type"
http://golang.org/ref/spec#Conversions
as for concatenation, you probably don't want to concatenate every single character with the + operator, since that will perform a lot of copying under the hood. If you're getting runes in one at a time and you're not building an intermediate slice of runes, you most likely want to use a bytes.Buffer, which has a WriteRune method for this sort of thing. http://golang.org/pkg/bytes/#Buffer.WriteRune
Use +
str:= str + "a"
You can try something like this :
string1 := "abc"
character1 := byte('A')
string1 += string(character1)
Even this answer might be of help.
definetly worth reading @nemo's post
Iterating over strings using range gives you Unicode characters while iterating over a string using an index gives you bytes. See the spec for runes and strings as well as their conversions.
Strings can be concatenated using the + operator.
The conversion from character to string is two-fold. You can convert a byte (or byte sequence) to a string:
string(byte('A'))
or you can convert a rune (or rune sequence) to a string:
string(rune('µ'))
