60 lines
1.3 KiB
Markdown
60 lines
1.3 KiB
Markdown
|
# Strings, Runes and Bytes Quiz
|
||
|
|
|
||
|
|
## Which byte slice below equals to the "keeper" string?
|
||
|
|
```go
|
||
|
|
// Here are the corresponding code points for the runes of "keeper":
|
||
|
|
// k => 107
|
||
|
|
// e => 101
|
||
|
|
// p => 112
|
||
|
|
// r => 114
|
||
|
|
```
|
||
|
|
1. []byte{107, 101, 101, 112, 101, 114} *CORRECT*
|
||
|
|
2. []byte{112, 101, 101, 112, 114, 101}
|
||
|
|
3. []byte{114, 101, 112, 101, 101, 112}
|
||
|
|
4. []byte{112, 101, 101, 114, 107, 101}
|
||
|
|
|
||
|
|
|
||
|
|
## What does this code print?
|
||
|
|
```go
|
||
|
|
// Code points:
|
||
|
|
// g => 103
|
||
|
|
// o => 111
|
||
|
|
fmt.Println(string(103), string(111))
|
||
|
|
```
|
||
|
|
1. 103 111
|
||
|
|
2. g o *CORRECT*
|
||
|
|
3. n o
|
||
|
|
4. "103 111"
|
||
|
|
|
||
|
|
|
||
|
|
## What does this code print?
|
||
|
|
```go
|
||
|
|
const word = "gökyüzü"
|
||
|
|
bword := []byte(word)
|
||
|
|
|
||
|
|
// ö => 2 bytes
|
||
|
|
// ü => 2 bytes
|
||
|
|
fmt.Println(utf8.RuneCount(bword), len(word), len(string(word[1])))
|
||
|
|
```
|
||
|
|
1. 7 10 2 *CORRECT*
|
||
|
|
2. 10 7 1
|
||
|
|
3. 10 7 2
|
||
|
|
4. 7 7 1
|
||
|
|
|
||
|
|
|
||
|
|
## Which one below is true?
|
||
|
|
1. for range loops over the bytes of a string
|
||
|
|
2. for range loops over the runes of a string *CORRECT*
|
||
|
|
|
||
|
|
|
||
|
|
## For a utf-8 encoded string value, which one below is true?
|
||
|
|
1. runes always start and end in the same indexes
|
||
|
|
2. runes may start and end in different indexes *CORRECT*
|
||
|
|
3. bytes may start and end in different indexes
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
## Why can't you change the bytes of a string value?
|
||
|
|
1. Strings values are immutable byte slices
|
||
|
|
2. Strings are used a lot so they are being shared behind the scenes
|
||
|
|
3. All of above *CORRECT*
|