Go Regular expression

Go Regular Expression Encyclopedia

Ackage Test

Import (
"FMT"
"RegExp"
)

Func regixbase () {
Findtest ()
Findindextest ()
Findstringtest ()
Findchinesstring ()
Findnumorlowerletter ()
Findandreplace ()
}

Incoming []byte, return []byte
Func findtest () {
str: = "Ab001234hah120210a880218end"
Reg: = RegExp. Mustcompile ("\d{6}")//six consecutive digits
Fmt. Println ("--find--")
Returns the first string in str that matches a reg
Data: = Reg. Find ([]byte (str))
Fmt. Println (String (data))

Fmt. PRINTLN ("------findall------")  
//returns the string//second parameter of all matching Reg in Str that  
represents the maximum number returned, and 1 indicates that all results are returned  
dataslice: = Reg. FindAll ([]byte (str),-1)  
for _, V: = range Dataslice {  
    fmt. Println (String (v))  
}  

}

Pass in []byte, return to index at first end position
Func findindextest () {
Fmt. Println ("--findindex--")
Returns the first position of a matching string
REG2: = RegExp. Mustcompile ("Start\d*end")//start start, end ends, middle is full of numbers
STR2: = "00start123endhahastart120psend09start10000end"
Index[0] Indicates the start position, index[1] indicates the end position
Index: = reg2. FindIndex ([]byte (STR2))
Fmt. Println ("Start:", Index[0], ", End:", index[1], str2[index[0]:index[1])

Fmt. PRINTLN ("------findallindex------")  
//returns the top position of all matching strings  
Indexslice: = reg2. Findallindex ([]byte (STR2),-1)  
for _, V: = range Indexslice {  
    fmt. Println ("Start:", V[0], ", End:", v[1], str2[v[0]:v[1])  
}  

}

Pass in string, return string (more convenient)
Func findstringtest () {
Fmt. Println ("--findstring--")

str: = "Ab001234hah120210a880218end"  
reg: = RegExp. Mustcompile ("\\d{6}")//six-bit sequential number  
FMT. Println (Reg. FindString (str))  
FMT. Println (Reg. Findallstring (str,-1))  
//The following two methods are similar to  
FMT. Println (Reg. Findstringindex (str))  
FMT. Println (Reg. FindIndex ([]byte (str))  

}

Find Chinese characters
Func findchinesstring () {
str: = "Hello china Hello World Peace Hi Good"
Reg: = RegExp. Mustcompile ("[\p{han}]+")
Fmt. Println (Reg. Findallstring (str,-1))

[China's world peace and good]  

}

Find numbers or lowercase letters
Func Findnumorlowerletter () {
str: = "Haha00azbapabc09fgabhy99"
Reg: = RegExp. Mustcompile ("[\d|a-z]+")
Fmt. Println (Reg. Findallstring (str,-1))

[00az abc09 AB 99]  

}

Find and replace
Func Findandreplace () {
str: = "Welcome for Beijing-tianjin CRH train."
Reg: = RegExp. Mustcompile ("")
Fmt. Println (Reg. Replaceallstring (str, "@"))//Replace space with @ character

Welcome@for@beijing-tianjin@crh@train.  

}