Golang string Common operations (go Practice code)

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Practice Golang String Common operations, backing up

Type conversions

Compare and contrast

Search Find Statistics

Replace

Delete filter

Uppercase and lowercase conversions

Prefix suffix

String segmentation

Stitching

3 Stitching strings in comparison

Func Main () {FMT. Println ("string test") fmt. Println ("string Conversion")//Gets the number of bits of the int type under the operating system platform under which the program runs, such as: StrConv.    IntSize. StrConv. IntSize FMT. Println ("Converts the string to int. ") var Trastr01 string =" traint01 ", Err_tra: = StrConv. Atoi (TRASTR01) if Err_tra! = nil {fmt. Println (Err_tra)} else {fmt. Println (traint01)} fmt. Println ("Convert String to Float64 type") var trastr02 string = "100.55" trafloat01, err_float: = StrConv. Parsefloat (Trastr02, ten) if err_float! = nil {fmt. Println (Err_float)} else {fmt. Println (trafloat01)} trastr03: = StrConv. Itoa (a) fmt. PRINTLN ("int to Word characters" + trastr03) var Str01 string = "Hello,world" Str02: = "Hello, world" FMT. Println (Str01) fmt. PRINTLN (STR02)/////string comparison com01: = Strings.compare (Str01, str02) if com01 = = 0 {fmt. Println ("equal")} else {fmt. Println ("unequal" + string (COM01))} FMT. PRINTLN (COM01)//find contains var iscon bool = strings. Contains (Str01, "Hello") FMt. Println (Iscon)//true//Find location var theindex int = strings. Index (Str01, ",") fmt. Println (theindex)//5 FMT. PRINTLN (Strings. Index (Str01, "haha"))//does not exist return-1 LastIndex: = Strings. LastIndex (Str01, "O") fmt. Println ("Index of last occurrence in string" + StrConv. Itoa (LastIndex))//7//-1 indicates that the string s does not contain a string//Count the occurrences of Sep for a given substring, and when Sep is null, returns 1 + the length of the string fmt. PRINTLN (Strings. Count ("Cheeseeee", "ee"))//3 FMT. PRINTLN (Strings. Count ("Five", ""))//5//repeats the S string Count times, and finally returns the newly generated duplicate string fmt. Println ("Hello" + strings. Repeat ("World")) FMT. PRINTLN ("replace")///In the S string, replace the old string with the new string, n indicates the number of substitutions, and less than 0 means replace all var str03 string = "/users//documents/gopatch/src/mygo/ config/teststring/"str04: = Strings. Replace (STR03, "/", "* *",-1) str05: = Strings. Replace (STR03, "/", "* *", 4) fmt. Println (str04)//**users****documents**gopatch**src**mygo**config**teststring** FMT. Println (str05)//**users****documents**gopatch/src/mygo/config/teststring/fmt. Println ("Delete stringOpening and trailing ") FMT. Println ("Delete both ends/=" + strings.) Trim (STR03, "/"))//users//documents/gopatch/src/mygo/config/teststring FMT. Println ("Delete left/=" + strings. Trimleft (STR03, "/"))//users//documents/gopatch/src/mygo/config/teststring///And trimright str06: = Strings. Trimspace ("Hello Hao Hao Hao") fmt. Println ("Remove the space at the beginning of the end =" + str06)//' Hello Hao Hao Hao ' fmt. PRINTLN ("Case") str07: = "Hello Hao hao Hao" fmt. PRINTLN (Strings. Title (str07))//hello Hao Hao Hao fmt. PRINTLN (Strings. ToLower ("Hello Hao Hao Hao"))//Hello Hao Hao Hao fmt. PRINTLN (Strings. ToUpper (str07))//hello HAO HAO HAO//prefix suffix FMT. PRINTLN (Strings. Hasprefix ("Gopher", "Go")//True FMT. PRINTLN (Strings. Hassuffix ("Amigo", "Go")//True FMT. Println ("string Split") Fieldsstr: = "Hello it's a nice Day Today"//split by whitespace character, without qualifying a few whitespace characters in the middle interval fieldsslece: = Strin Gs. Fields (FIELDSSTR) fmt. Println (fieldsslece)//[hello it ' s a nice Day today] for I, V: = RanGE fieldsslece {FMT. Printf ("subscript%d corresponding value =%s \ n", I, v)} for I: = 0; I < Len (fieldsslece); i++ {fmt. Println (Fieldsslece[i])}//Split slice01 according to specific characters: = strings. Split ("Q,w,e,r,t,y,", ",") fmt. Println (SLICE01)//[q W e r t y] fmt. Println (Cap (SLICE01))//7 the last number of empty "" For I, V: = Range slice01 {fmt. Printf ("subscript%d corresponding value =%s \ n", I, V)}//Stitching//join is used to slice the element type string, using a split symbol to stitch together a string: var str08 string = Strings. Join (Fieldsslece, ",") fmt. PRINTLN ("Join stitching result =" + str08)//hello,it ' S,a,nice,day,today fmt. Println ("------------contrast string concatenation efficiency----------------") var buffer bytes. Buffer Start: = time. Now () for I: = 0; I < 100000; i++ {buffer. WriteString ("Test is here\n")} buffer. String ()//stitching result End: = time. Now () Fmt. Println ("Buffer time is", end.) Sub (Start). Seconds ()) Start = time. Now () str: = "" For I: = 0; I < 100000; i++ {str + = "Test is here\n"} end = time. Now () Fmt. PrIntln ("+ = Time is", end.) Sub (Start). Seconds ()) Start = time. Now () var sl []string for I: = 0; I < 100000; i++ {SL = append (SL, "Test is here\n")} strings. Join (SL, "") End = time. Now () Fmt. Println ("Join time is", end.) Sub (Start). Seconds ())/* Buffer time is 0.00388283 + = time is 11.730007558 Join time is 0.016644653 */}