38 lines
739 B
Go
38 lines
739 B
Go
package ebt
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import (
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"code.google.com/p/go-tour/tree"
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)
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// Walk walks the tree t sending all values
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// from the tree to the channel ch.
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func Walk(t *tree.Tree, ch chan int) {
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// do it as a nested closure so that I can control the call to close so
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// that I can use the range-based forloop in main.main
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defer close(ch)
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var walk func(t *tree.Tree)
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walk = func(t *tree.Tree) {
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if t != nil {
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walk(t.Left)
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ch <- t.Value
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walk(t.Right)
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}
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}
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walk(t)
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}
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// Same determines whether the trees
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// t1 and t2 contain the same values.
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func Same(t1, t2 *tree.Tree) bool {
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ch1 := make(chan int)
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ch2 := make(chan int)
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go Walk(t1, ch1)
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go Walk(t2, ch2)
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for i := range ch1 {
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if i != <-ch2 {
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return false
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}
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}
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return true
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}
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