30 lines
743 B
Go
30 lines
743 B
Go
package main
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import "fmt"
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// Go supports anonymous functions, which can form closures. Anonymous functions are useful when you want to define a function inline without having to name it.
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// intSeq returns another function, which is defined anonymously in the body of intSeq
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// the returned function closes over the variable i to form a closure
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func intSeq() func() int {
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i := 0
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return func() int {
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i++
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return i
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}
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}
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func main() {
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// call intSeq, assigning the result (a function) to nextInt
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nextInt := intSeq()
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// see the effect of the closure
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fmt.Println(nextInt())
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fmt.Println(nextInt())
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fmt.Println(nextInt())
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// confirm that the state is unique to that particular function
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newInts := intSeq()
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fmt.Println(newInts())
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}
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