英文:
How to convert a uint64 into uint?
问题
我有以下函数：
func (rc ResizeController) Resize(c *gin.Context) {
height := c.Query("height")
width := c.Query("width")
filepath := c.Query("file")
h, err := strconv.ParseUint(height, 10, 32)
w, err := strconv.ParseUint(width, 10, 32)
file, err := os.Open("./test_images/" + filepath)
if err != nil {
log.Fatal(err)
}
image, err := jpeg.Decode(file)
if err != nil {
log.Fatal(err)
}
m := resize.Resize(1000, 100, image, resize.Lanczos3)
buf := new(bytes.Buffer)
jpeg.Encode(buf, m, nil)
response := buf.Bytes()
c.Data(200, "image/jpeg", response)
}
但是我得到以下错误：
controllers/resize_controller.go:41: cannot use h (type uint64) as type uint in argument to resize.Resize
controllers/resize_controller.go:41: cannot use w (type uint64) as type uint in argument to resize.Resize
我尝试了一些不同的strconv库函数，但没有成功！
英文:
I have the following function:
func (rc ResizeController) Resize(c *gin.Context) {
height := c.Query("height")
width := c.Query("width")
filepath := c.Query("file")
h, err := strconv.ParseUint(height, 10, 32)
w, err := strconv.ParseUint(width, 10, 32)
file, err := os.Open("./test_images/" + filepath)
if err != nil {
log.Fatal(err)
}
image, err := jpeg.Decode(file)
if err != nil {
log.Fatal(err)
}
m := resize.Resize(1000, 100, image, resize.Lanczos3)
buf := new(bytes.Buffer)
jpeg.Encode(buf, m, nil)
response := buf.Bytes()
c.Data(200, "image/jpeg", response)
}
But I get the following error:
controllers/resize_controller.go:41: cannot use h (type uint64) as type uint in argument to resize.Resize
controllers/resize_controller.go:41: cannot use w (type uint64) as type uint in argument to resize.Resize
I've tried a few different functions from the strconv lib with no luck!
答案1
得分: 37
不需要使用任何strconv函数；只需进行类型转换为uint：
h64, err := strconv.ParseUint(height, 10, 32)
if err != nil {
// TODO: 处理错误
}
w64, err := strconv.ParseUint(width, 10, 32)
if err != nil {
// TODO: 处理错误
}
h := uint(h64)
w := uint(w64)
英文:
No need to use any of the strconv functions; just do a type conversion to uint:
h64, err := strconv.ParseUint(height, 10, 32)
if err != nil {
// TODO: handle error
}
w64, err := strconv.ParseUint(width, 10, 32)
if err != nil {
// TODO: handle error
}
h := uint(h64)
w := uint(w64)
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