Package utf8string provides an efficient way to index strings by rune rather than by byte.



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    const CaptchaLen = 4
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    const XRequestedWith = "X-Requested-With"


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    func CheckInt

    func CheckInt(form url.Values, field string) bool

      检测提交请求的参数是否是 int 类型

      func DoGet

      func DoGet(url string, extras (body []byte, err error)

      func DoPost

      func DoPost(url string, data url.Values, extras (body []byte, err error)

      func DoPostRaw

      func DoPostRaw(url string, bodyType string, data interface{}, extras (body []byte, err error)

      func EmbedWide

      func EmbedWide(content string) string

        内嵌 Wide iframe 版

        func Exist

        func Exist(filename string) bool

          检查文件或目录是否存在 如果由 filename 指定的文件或目录存在则返回 true,否则返回 false

          func FetchRealUrl

          func FetchRealUrl(uri string) (realUrl string)

            FetchRealUrl 获取链接真实的URL(获取重定向一次的结果URL)

            func Gravatar

            func Gravatar(avatar string, emailI interface{}, size uint16, isHttps bool) string


              func InSlice

              func InSlice(i int, slice []int) bool

                InSlice 判断 i 是否在 slice 中

                func IsAjax

                func IsAjax(ctx echo.Context) bool

                func IsDir

                func IsDir(filename string) bool

                  判断给定文件名是否是一个目录 如果文件名存在并且为目录则返回 true。如果 filename 是一个相对路径,则按照当前工作目录检查其相对路径。

                  func IsFile

                  func IsFile(filename string) bool

                    判断给定文件名是否为一个正常的文件 如果文件存在且为正常的文件则返回 true

                    func Max

                    func Max(x, y int) int

                    func Models2Intslice

                    func Models2Intslice(models interface{}, idField string) []int

                      model中类型提取其中的 idField(int 类型) 属性组成 slice 返回

                      func MonthDayNum

                      func MonthDayNum(t time.Time) int

                        MonthDayNum t 所在时间的月份总天数

                        func SafeHtml

                        func SafeHtml(s string) string

                        func ScanDir

                        func ScanDir(directory string) []string

                          列出指定路径中的文件和目录 如果目录不存在,则返回空slice

                          func SetCaptcha

                          func SetCaptcha(id string)

                            SetCaptcha 设置验证码

                            func Struct2Map

                            func Struct2Map(dest map[string]interface{}, src interface{}) error

                            func Substring

                            func Substring(str string, length int, suffix string) string


                              func TimeAgo

                              func TimeAgo(t time.Time) string

                              func UMin

                              func UMin(x, y int) int


                                func UnderscoreName

                                func UnderscoreName(name string) string



                                  type String

                                  type String struct {
                                  	// contains filtered or unexported fields

                                    String wraps a regular string with a small structure that provides more efficient indexing by code point index, as opposed to byte index. Scanning incrementally forwards or backwards is O(1) per index operation (although not as fast a range clause going forwards). Random access is O(N) in the length of the string, but the overhead is less than always scanning from the beginning. If the string is ASCII, random access is O(1). Unlike the built-in string type, String has internal mutable state and is not thread-safe.

                                    func NewString

                                    func NewString(contents string) *String

                                      NewString returns a new UTF-8 string with the provided contents.

                                      func (*String) At

                                      func (s *String) At(i int) rune

                                        At returns the rune with index i in the String. The sequence of runes is the same as iterating over the contents with a "for range" clause.

                                        func (*String) Init

                                        func (s *String) Init(contents string) *String

                                          Init initializes an existing String to hold the provided contents. It returns a pointer to the initialized String.

                                          func (*String) IsASCII

                                          func (s *String) IsASCII() bool

                                            IsASCII returns a boolean indicating whether the String contains only ASCII bytes.

                                            func (*String) RuneCount

                                            func (s *String) RuneCount() int

                                              RuneCount returns the number of runes (Unicode code points) in the String.

                                              func (*String) Slice

                                              func (s *String) Slice(i, j int) string

                                                Slice returns the string sliced at rune positions [i:j].

                                                func (*String) String

                                                func (s *String) String() string

                                                  String returns the contents of the String. This method also means the String is directly printable by fmt.Print.