GO Compare用法及代码示例

package main

import (
    "bytes"
)

func main() {
    // Interpret Compare's result by comparing it to zero.
    var a, b []byte
    if bytes.Compare(a, b) < 0 {
        // a less b
    }
    if bytes.Compare(a, b) <= 0 {
        // a less or equal b
    }
    if bytes.Compare(a, b) > 0 {
        // a greater b
    }
    if bytes.Compare(a, b) >= 0 {
        // a greater or equal b
    }

    // Prefer Equal to Compare for equality comparisons.
    if bytes.Equal(a, b) {
        // a equal b
    }
    if !bytes.Equal(a, b) {
        // a not equal b
    }
}

package main

import (
    "bytes"
    "sort"
)

func main() {
    // Binary search to find a matching byte slice.
    var needle []byte
    var haystack [][]byte // Assume sorted
    i := sort.Search(len(haystack), func(i int) bool {
        // Return haystack[i] >= needle.
        return bytes.Compare(haystack[i], needle) >= 0
    })
    if i < len(haystack) && bytes.Equal(haystack[i], needle) {
        // Found it!
    }
}