93 lines
1.8 KiB
Go
93 lines
1.8 KiB
Go
package _5_array
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import (
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"errors"
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"fmt"
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)
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/**
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* 1) 数组的插入、删除、按照下标随机访问操作；
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* 2）数组中的数据是int类型的；
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*
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* Author: leo
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*/
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type Array struct {
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data []int
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length uint
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}
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//为数组初始化内存
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func NewArray(capacity uint) *Array {
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if capacity == 0 {
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return nil
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}
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return &Array{
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data: make([]int, capacity, capacity),
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length: 0,
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}
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}
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func (this *Array) Len() uint {
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return this.length
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}
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//判断索引是否越界
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func (this *Array) isIndexOutOfRange(index uint) bool {
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if index >= uint(cap(this.data)) {
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return true
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}
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return false
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}
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//通过索引查找数组，索引范围[0,n-1]
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func (this *Array) Find(index uint) (int, error) {
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if this.isIndexOutOfRange(index) {
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return 0, errors.New("out of index range")
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}
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return this.data[index], nil
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}
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//插入数值到索引index上
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func (this *Array) Insert(index uint, v int) error {
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if this.Len() == uint(cap(this.data)) {
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return errors.New("full array")
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}
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if index != this.length && this.isIndexOutOfRange(index) {
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return errors.New("out of index range")
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}
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for i := this.length; i > index; i-- {
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this.data[i] = this.data[i-1]
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}
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this.data[index] = v
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this.length++
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return nil
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}
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func (this *Array) InsertToTail(v int) error {
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return this.Insert(this.Len(), v)
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}
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//删除索引index上的值
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func (this *Array) Delete(index uint) (int, error) {
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if this.isIndexOutOfRange(index) {
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return 0, errors.New("out of index range")
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}
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v := this.data[index]
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for i := index; i < this.Len()-1; i++ {
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this.data[i] = this.data[i+1]
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}
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this.length--
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return v, nil
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}
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//打印数列
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func (this *Array) Print() {
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var format string
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for i := uint(0); i < this.Len(); i++ {
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format += fmt.Sprintf("|%+v", this.data[i])
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}
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fmt.Println(format)
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}
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