forked from mirror/stringy
Add methods for prefixing and suffixing
Closes #5 Add methods for prefixing and suffixing Closes #5
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README.md
20
README.md
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@ -332,6 +332,26 @@ LcFirst simply returns result by lower casing first letter of string and it can
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```
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#### Prefix(string) string
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Prefix makes sure string has been prefixed with a given string and avoids adding it again if it has.
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```go
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ufo := stringy.New("known flying object")
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fmt.Println(ufo.Prefix("un")) // unknown flying object
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```
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#### Suffix(string) string
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Suffix makes sure string has been suffixed with a given string and avoids adding it again if it has.
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```go
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pun := stringy.New("this really is a cliff")
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fmt.Println(pun.Suffix("hanger")) // this really is a cliffhanger
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```
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## Running the tests
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``` bash
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@ -74,4 +74,9 @@ func main() {
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last := lcn.Last(4)
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fmt.Println(last) // 1348
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ufo := stringy.New("known flying object")
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fmt.Println(ufo.Prefix("un")) // unknown flying object
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pun := stringy.New("this really is a cliff")
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fmt.Println(pun.Suffix("hanger")) // this really is a cliffhanger
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}
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22
stringy.go
22
stringy.go
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@ -41,6 +41,8 @@ type StringManipulation interface {
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ToLower() string
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ToUpper() string
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UcFirst() string
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Prefix(with string) string
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Suffix(with string) string
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}
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// New func returns pointer to input struct
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@ -329,3 +331,23 @@ func (i *input) UcFirst() string {
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input := getInput(*i)
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return ucfirst(input)
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}
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// Prefix makes sure that string is prefixed with a given string
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func (i *input) Prefix(with string) string {
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input := getInput(*i)
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if strings.HasPrefix(input, with) {
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return input
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}
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return with + input
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}
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// Suffix makes sure that string is suffixed with a given string
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func (i *input) Suffix(with string) string {
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input := getInput(*i)
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if strings.HasSuffix(input, with) {
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return input
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}
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return input + with
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}
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@ -1,6 +1,7 @@
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package stringy
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import (
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"fmt"
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"testing"
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)
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@ -310,3 +311,29 @@ func TestInput_Last(t *testing.T) {
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t.Errorf("Expected: to be %s but got: %s", against, last)
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}
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}
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func ExampleStringManipulation_Prefix() {
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fmt.Println(New("foobar").Prefix("foo"))
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fmt.Println(New("foobar").Prefix("foofoo"))
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fmt.Println(New("foobar").Prefix("/"))
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fmt.Println(New("").Prefix("_"))
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// Output:
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// foobar
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// foofoofoobar
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// /foobar
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// _
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}
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func ExampleStringManipulation_Suffix() {
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fmt.Println(New("foobar").Suffix("bar"))
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fmt.Println(New("foobar").Suffix("barbar"))
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fmt.Println(New("foobar").Suffix("/"))
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fmt.Println(New("foobar/").Suffix("/"))
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fmt.Println(New("").Suffix("_"))
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// Output:
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// foobar
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// foobarbarbar
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// foobar/
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// foobar/
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// _
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}
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