Go 语言提供了一个字符串包,其中包含不同类型的函数来操作 UTF-8 编码的字符串。要访问字符串包的函数,您需要借助 import 关键字在程序中导入一个字符串包。
Function | Description |
---|---|
func Compare | This function is used to return an integer comparing two strings lexicographically. |
func Contains | This function is used to check whether substr is within s or not. |
func ContainsAny | This function is used to check whether any Unicode code points in chars are within s or not. |
func ContainsRune | This function is used to check whether the Unicode code point r is within s or not. |
func Count | This function is used to count the number of non-overlapping instances of substr in given string s. |
func EqualFold | This function is used to check whether s and t, interpreted as UTF-8 strings, are equal under Unicode case-folding, which is a more general form of case-insensitivity or not. |
func Fields | This function is used to splits the given string s around each instance of one or more consecutive white space characters, as defined by unicode.IsSpace, returning a slice of substrings of s or an empty slice if s contains only white space. |
func FieldsFunc | This function is used to splits the string s at each run of Unicode code points c satisfying f(c) and returns an array of slices of s. |
func HasPrefix | This function is used to cehck whether the string s begins with prefix or not. |
HasSuffix | This function is used to check whether the string s ends with suffix or not. |
func Index | This function is used to returns the index of the first instance of substr in s or -1 if substr is not present in s. |
func IndexAny | This function is used to returns the index of the first instance of any Unicode code point from chars in s, or -1 if no Unicode code point from chars is present in s. |
func IndexByte | This function is used to returns the index of the first instance of c in s, or -1 if c is not present in s. |
func IndexFunc | This function is used to returns the index into s of the first Unicode code point satisfying f(c) or -1 if none do. |
func IndexRune | This function is used to returns the index of the first instance of the Unicode code point r, or -1 if rune is not present in s. |
func Join | This function is used to concatenate the elements of its first argument to create a single string. |
func LastIndex | This function is used to returns the index of the last instance of substr in s, or -1 if substr is not present in s. |
func LastIndexAny | This function is used to returns the index of the last instance of any Unicode code point from chars in s, or -1 if no Unicode code point from chars is present in s. |
func LastIndexByte | This function is used to returns the index of the last instance of c in s, or -1 if c is not present in s. |
func LastIndexFunc | This function is used to returns the index into s of the last Unicode code point satisfying f(c), or -1 if none do. |
func Map | This function is used to returns a copy of the string s with all its characters modified according to the mapping function. |
func Repeat | This function is used to returns a new string consisting of count copies of the string s. |
func Replace | This function is used to returns a copy of the string s with the first n non-overlapping instances of old replaced by new. |
func ReplaceAll | This function is used to returns a copy of the string s with all non-overlapping instances of old replaced by new. |
func Split | This function is used to slices s into all substrings separated by sep and returns a slice of the substrings between those separators. |
func SplitAfter | This function is used to slices s into all substrings after each instance of sep and returns a slice of those substrings. |
func SplitAfterN | This function is used to slices s into substrings after each instance of sep and returns a slice of those substrings. |
func SplitN | This function is used to slices s into substrings separated by sep and returns a slice of the substrings between those separators. |
func Title | This function is used to returns a copy of the string s with all Unicode letters that begin words mapped to their Unicode title case. |
func ToLower | This method is used to returns s with all Unicode letters mapped to their lower case. |
func ToLowerSpecial | This function is used to returns a copy of the string s with all Unicode letters mapped to their lower case using the case mapping specified by c. |
func ToTitle | This function is used to returns a copy of the string s with all Unicode letters mapped to their Unicode title case. |
func ToTitleSpecial | This function is used to returns a copy of the string s with all Unicode letters mapped to their Unicode title case, giving priority to the special casing rules. |
func ToUpper | This function is used to returns s with all Unicode letters mapped to their upper case. |
func ToUpperSpecial | This function is used to returns a copy of the string s with all Unicode letters mapped to their upper case using the case mapping specified by c. |
func ToValidUTF8 | This function is used to returns a copy of the string s with each run of invalid UTF-8 byte sequences replaced by the replacement string, which may be empty. |
func Trim | This function is used to returns a slice of the given string with all leading and trailing Unicode code points contained in cutset removed. |
func TrimFunc | This function is used to returns a slice of the given string with all leading and trailing Unicode code points c satisfying f(c) removed. |
func TrimLeft | This method is used to returns a slice of the given string with all leading Unicode code points contained in cutset removed. |
func TrimLeftFunc | This function is used to returns a slice of the given string with all leading Unicode code points c satisfying f(c) removed. |
func TrimPrefix | This function is used to returns s without the provided leading prefix string. If s doesn’t start with prefix, s is returned unchanged. |
func TrimRight | This function is used to returns a slice of the given string, with all trailing Unicode code points contained in cutset removed. |
func TrimRightFunc | This function is used to returns a slice of the given string with all trailing Unicode code points c satisfying f(c) removed. |
func TrimSpace | This function is used to returns a slice of given the string, with all leading and trailing white space removed, as defined by Unicode. |
func TrimSuffix | This function is used to returns s without the provided trailing suffix string. |
类型生成器
Method | Description |
---|---|
func (*Builder) Cap | This method is used to returns the capacity of the builder’s underlying byte slice. |
func (*Builder) Grow | This method is used to grows b’s capacity if necessary, to guarantee space for another n bytes. |
func (*Builder) Len | This method is used to returns the number of accumulated bytes. |
func (*Builder) Reset | This method is used to resets the Builder to be empty. |
func (*Builder) String | This method is used to returns the accumulated string. |
func (*Builder) Write | This method is used to appends the contents of p to b’s buffer. |
func (*Builder) WriteByte | This method is used to appends the byte c to b’s buffer. |
func (*Builder) WriteRune | This method is used to appends the UTF-8 encoding of Unicode code point r to b’s buffer. |
func (*Builder) WriteString | This method is used to appends the contents of str to b’s buffer. It returns the length of str and a nil error. |
类型阅读器
Method | Description |
---|---|
func NewReader | This function is used to returns a new Reader reading from s. |
func (*Reader) Len | This method is used to returns the number of bytes of the unread portion of the string. |
func (*Reader) Reset | This method is used to resets the Reader to be reading from s. |
func (*Reader) Seek | This method is used to implements the io.Seeker interface. |
func (*Reader) Size | This method is used to returns the original length of the underlying string. |
func (*Reader) WriteTo | This method is used to implements the io.WriterTo interface. |
类型替换器
Method | Description |
---|---|
func NewReplacer | This function is used to returns a new Replacer from a list of old, new string pairs. |
func (*Replacer) Replace | This method is used to returns a copy of s with all replacements performed. |
func (*Replacer) WriteString | This method is used to writes s to w with all replacements performed. |
示例 1:
// Golang program to illustrate the use of
// the strings.Compare() Function
package main
import (
"fmt"
"strings"
)
func main() {
var r1 = "Geeks"
var r2 = "GeeksforGeeks"
var r3 = "Geeks"
// using the function
fmt.Println(strings.Compare(r1, r2))
fmt.Println(strings.Compare(r2, r3))
fmt.Println(strings.Compare(r3, r1))
}
输出:
-1
1
0
示例 2:
// Golang program to illustrate
// the strings.IndexAny() Function
package main
import (
"fmt"
"strings"
)
// Main function
func main() {
// using the function
fmt.Println(strings.IndexAny("Hey GFG?", "y"))
}
输出:
2