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binary search in Golang
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| package main | |
| import ( | |
| "fmt" | |
| ) | |
| func binary_search(arr []int, item int) int { | |
| max := len(arr) | |
| low := 0 | |
| for low <= max { | |
| mid := (low + max) / 2 | |
| fmt.Println(low, max, mid) | |
| if arr[mid] == item { | |
| return mid | |
| } | |
| if arr[mid] > item { | |
| max = mid - 1 | |
| } else { | |
| low = mid + 1 | |
| } | |
| } | |
| return 0 | |
| } | |
| func main() { | |
| //create test array | |
| min, max := 1, 100000 | |
| x := make([]int, max) | |
| for i := range x { | |
| x[i] = i + min | |
| } | |
| fmt.Println(binary_search(x, 1)) | |
| } |
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