How to append a character to a string??

[perf...@gmail.com]

Just a simple thing and I can't find how to do it anywhere, the append function doesn't work with strings, it says "first argument to append must be slice; have string".

Please show me some reference about strings and characters, I can't find anything in go tour and also in the spec, I can't find it in the package ref either :(.
p.s: I'm struggling to do this utter simple stupid task! I'm looking like an idiot T_T.

[Miek Gieben]

[ Quoting <perf...@gmail.com> in "[go-nuts] How to append a character..." ]

> Please show me some reference about strings and characters, I can't find
> anything in go tour and also in the spec, I can't find it in the package ref

Use +

str := str + "a"

for instance.


Regards,

--
Miek Gieben http://miek.nl

[Jan Mercl]

From: http://golang.org/ref/spec#Arithmetic_operators

"Strings can be concatenated using the + operator or the += assignment operator"

[Patrick Mylund Nielsen]

If you're doing this a lot for single characters, you may want to make
a slice of runes, append to that, and convert the slice to a string at
the end. You're creating a new, full string every time you use string
+= x or string = string + x

[Patrick Mylund Nielsen]

Actually, you may want to do it anywhere you're doing excessive
concatenation, even when it's multiple characters -- you can use a
[]string, and run strings.Join at the end:
http://golang.org/pkg/strings/#Join. Join creates a slice of bytes of
the final size, writes all the strings from the []string to it, and
returns the byte slice cast to a string.

[dlin]

Here are my sample

func main() {

s := "abc"

c := byte('A')

s += string(c)

fmt.Println("Hello, playground",s ,c)

[Nguyên Nguyễn Văn Cao]

Good to see a Vietnamese here!

Hope you found your answer

Vào 23:47:32 UTC+7 Thứ sáu, ngày 11 tháng năm năm 2012, Thanh Hai Nguyen đã viết:

[Brian Sturgill]

I'm not sure your sample does what you want it to.... a byte is 256 bits, unicode runes can be larger than that.

s += string('A') will let larger unicode characters work as well.

On a related note, I was please to see that string([]rune) also works as you would hope it would.

[Peter Nguyen]

http://golang-examples.tumblr.com/post/86169510884/fastest-string-contatenation