Golang Tutorial (Go language) standard library analysis starts with the string

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Today we continue to talk about the Golang standard Library of string This package, I chose this is to see the next package really needs this feature so we come to this package, the string package implements a simple function method to manipulate the string. The type of reader is simple because it returns a *reader this uses the IO we talked about, and it doesn't say much about getting into the chase.

(1) func Contains(s, substr string) bool This function is to find out if a character exists in the string, and there is a return true
[PHP]
Import (
"FMT"
"Strings"
)

Func Main () {
Fmt. PRINTLN (Strings. Contains ("Widuu", "wi"))//true
Fmt. PRINTLN (Strings. Contains ("wi", "Widuu"))//false
}
[/php]

(2) func ContainsAny(s, chars string) bool This is whether the query string contains more than one character
[PHP]
Import (
"FMT"
"Strings"
)

Func Main () {
Fmt. PRINTLN (Strings. Containsany ("Widuu", "W&d"))//true
}
[/php]

(3) func ContainsRune(s string, r rune) bool , where the side is of course the string contains the rune type, where the rune type is UTF8. Runecountstring can fully represent the type of all Unicode characters
[PHP]
Import (
"FMT"
"Strings"
)

Func Main () {
Fmt. PRINTLN (Strings. Containsrune ("Widuu", Rune (' W ')))//true
Fmt. PRINTLN (Strings. Containsrune ("Widuu",))//fasle
}
[/php]

(4) func Count(s, sep string) int The function of this is to output the number of characters that match in a string
[PHP]
Import (
"FMT"
"Strings"
)

Func Main () {
Fmt. PRINTLN (Strings. Count ("Widuu", "UU"))//1
Fmt. PRINTLN (Strings. Count ("Widuu", "U"))//2
}
[/php]

(5) func EqualFold(s, t string) bool This is to determine if the s,t two strings are equal UFF8 encoded in the case of a full lowercase
[PHP]
Import (
"FMT"
"Strings"
)

Func Main () {
Fmt. PRINTLN (Strings. Equalfold ("Widuu", "Widuu"))//true
}
[/php]

(6) func Fields(s string) []string , the function is to divide the string according to 1:n space, and the last return is []string slice
[PHP]
Import (
"FMT"
"Strings"
)

Func Main () {
Fmt. PRINTLN (Strings. Fields ("Hello Widuu Golang"))//out [Hello Widuu Golang]
}
[/php]

(7) func FieldsFunc(s string, f func(rune) bool) []string See, this is based on a custom function split
[PHP]
Import (
"FMT"
"Strings"
)

Func Main () {
Fmt. PRINTLN (Strings. Fieldsfunc ("Widuunhellonword", split))//[widuu Hello Word] split by n character
}

Func split (S rune) bool {
if s = = ' n ' {
return True
}
return False
}
[/php]
(8) To func HasPrefix(s, prefix string) bool determine whether a string starts with
[PHP]
Import (
"FMT"
"Strings"
)

Func Main () {
Fmt. PRINTLN (Strings. Hasprefix ("Widuu_web", "Widuu"))//true
}
[/php]

(9) func HasSuffix(s, suffix string) bool , determine if there is any suffix, return bool value
[PHP]
Import (
"FMT"
"Strings"
)

Func Main () {
Fmt. PRINTLN (Strings. Hassuffix ("Nihaowiduu", "Widuu"))//true
}
[/php]

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