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feat: 1694. Reformat Phone Number (#102)
Signed-off-by: ashing <axingfly@gmail.com>
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,51 @@ | ||
package _694 | ||
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import ( | ||
"bytes" | ||
"strings" | ||
) | ||
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func reformatNumber(number string) string { | ||
number = strings.Replace(number, " ", "", -1) | ||
number = strings.Replace(number, "-", "", -1) | ||
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var res bytes.Buffer | ||
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if len(number)%3 == 1 { // 最后是 xx-xx | ||
for i := 0; i < len(number)-4; i++ { | ||
if i%3 == 0 && i != 0 { | ||
res.WriteByte('-') | ||
} | ||
res.WriteByte(number[i]) | ||
} | ||
if len(res.String()) > 0 { | ||
res.WriteByte('-') | ||
} | ||
res.WriteString(number[len(number)-4 : len(number)-2]) | ||
res.WriteByte('-') | ||
res.WriteString(number[len(number)-2:]) | ||
return res.String() | ||
} | ||
if len(number)%3 == 2 { // 最后是 xx | ||
for i := 0; i < len(number)-2; i++ { | ||
if i%3 == 0 && i != 0 { | ||
res.WriteByte('-') | ||
} | ||
res.WriteByte(number[i]) | ||
} | ||
if len(res.String()) > 0 { | ||
res.WriteByte('-') | ||
} | ||
res.WriteString(number[len(number)-2:]) | ||
return res.String() | ||
} | ||
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for i := 0; i < len(number); i++ { | ||
if i%3 == 0 && i != 0 { | ||
res.WriteByte('-') | ||
} | ||
res.WriteByte(number[i]) | ||
} | ||
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return res.String() | ||
} |
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@@ -0,0 +1,27 @@ | ||
package _694 | ||
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import "testing" | ||
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func Test_reformatNumber(t *testing.T) { | ||
type args struct { | ||
number string | ||
} | ||
tests := []struct { | ||
name string | ||
args args | ||
want string | ||
}{ | ||
{ | ||
name: "one", | ||
args: args{number: "1-23-45 6"}, | ||
want: "123-456", | ||
}, | ||
} | ||
for _, tt := range tests { | ||
t.Run(tt.name, func(t *testing.T) { | ||
if got := reformatNumber(tt.args.number); got != tt.want { | ||
t.Errorf("reformatNumber() = %v, want %v", got, tt.want) | ||
} | ||
}) | ||
} | ||
} |
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@@ -0,0 +1,21 @@ | ||
package solution1 | ||
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import "strings" | ||
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func reformatNumber(number string) string { | ||
number = strings.ReplaceAll(strings.ReplaceAll(number, "-", ""), " ", "") | ||
var format func(sub string) string | ||
format = func(sub string) string { | ||
if len(sub) == 2 { | ||
return sub | ||
} | ||
if len(sub) == 3 { | ||
return sub | ||
} | ||
if len(sub) == 4 { | ||
return sub[:2] + "-" + sub[2:] | ||
} | ||
return sub[:3] + "-" + format(sub[3:]) | ||
} | ||
return format(number) | ||
} |