catering/utils/utils.go

package utils

import (
	"math"
	"sort"
)

//Int64排序
func QuickSort(a []int64, left int64, right int64) {
	if left >= right {
		return
	}
	temp := a[left]
	start := left
	stop := right
	for right != left {
		for right > left && a[right] >= temp {
			right--
		}
		for left < right && a[left] <= temp {
			left++
		}
		if right > left {
			a[right], a[left] = a[left], a[right]
		}
	}
	a[right], a[start] = temp, a[right]
	QuickSort(a, start, left)
	QuickSort(a, right+1, stop)
}

// 字符串去重
func RemoveRepeatedElement(arr []string) (newArr []string) {
	newArr = make([]string, 0)
	sort.Strings(arr)
	for i := 0; i < len(arr); i++ {
		repeat := false
		for j := i + 1; j < len(arr); j++ {
			if arr[i] == arr[j] {
				repeat = true
				break
			}
		}
		if !repeat {
			newArr = append(newArr, arr[i])
		}
	}
	return
}
func Round(f float64, n int) float64 {
	n10 := math.Pow10(n)
	return math.Trunc((f+0.5/n10)*n10) / n10
}