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44 lines
647 B
44 lines
647 B
5 years ago
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## join
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### Instructions
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Write a function, Unmatch, that returns the element of the slice (arr) that does not have a correspondent pair.
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The function must have the next signature.
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### Expected function
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```go
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func Unmatch(arr []int) int {
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}
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```
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### Usage
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Here is a possible [program](TODO-LINK) to test your function :
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```go
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package main
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import (
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"fmt"
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student ".."
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)
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func main() {
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arr := []int{1, 2, 3, 1, 2, 3, 4}
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unmatch := student.Unmatch(arr)
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fmt.Println(unmatch)
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}
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```
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And its output :
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```console
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student@ubuntu:~/student/unmatch$ go build
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student@ubuntu:~/student/unmatch$ ./unmatch
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4
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student@ubuntu:~/student/unmatch$
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```
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