mirror of https://github.com/tidwall/tile38.git
43 lines
1.0 KiB
Markdown
43 lines
1.0 KiB
Markdown
|
CAST
|
||
|
|
====
|
||
|
|
|
||
|
|
[](https://godoc.org/github.com/tidwall/cast)
|
||
|
|
|
||
|
|
Quickly convert string <-> []byte without memory reallocations and create mutable string or immutable []byte.
|
||
|
|
|
||
|
|
This package is a **danger zone** and should not be entered without understanding the ground rules.
|
||
|
|
|
||
|
|
1. Converting a string -> []byte will result in an immutable byte slice. Editing will cause a panic.
|
||
|
|
2. Converting a []byte -> string will result in a mutable string. Editing the originial bytes will change the string too.
|
||
|
|
|
||
|
|
|
||
|
|
Create immutable []byte:
|
||
|
|
|
||
|
|
```go
|
||
|
|
var s = "Hello Planet"
|
||
|
|
b := cast.ToBytes(s)
|
||
|
|
fmt.Printf("%s\n", "J"+string(b[1:]))
|
||
|
|
|
||
|
|
// Output:
|
||
|
|
// Jello Planet
|
||
|
|
```
|
||
|
|
|
||
|
|
Create mutable string:
|
||
|
|
|
||
|
|
```go
|
||
|
|
var b = []byte("Hello Planet")
|
||
|
|
s := cast.ToString(b)
|
||
|
|
b[0] = 'J'
|
||
|
|
fmt.Printf("%s\n", s)
|
||
|
|
|
||
|
|
// Output:
|
||
|
|
// Jello Planet
|
||
|
|
```
|
||
|
|
|
||
|
|
## Contact
|
||
|
|
Josh Baker [@tidwall](http://twitter.com/tidwall)
|
||
|
|
|
||
|
|
## License
|
||
|
|
|
||
|
|
CAST source code is available under the MIT [License](/LICENSE).
|