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<?php

/**

* Created by PhpStorm.

* User: leo

* Date: 2018/10/5

* Time: 9:13

*/

/**

* 简单数组类

*/

class MyArray

{

//数据

private $data;

//容量

private $capacity;

//长度

private $length;

/**

* MyArray constructor.

* @param $capacity

*/

public function __construct($capacity)

{

$capacity = intval($capacity);

if($capacity <= 0) {

return null;

}

$this->data = array();

$this->capacity = $capacity;

$this->length = 0;

}

/**

* 数组是否已满

* @return bool

*/

public function checkIfFull()

{

if($this->length == $this->capacity) {

return true;

}

return false;

}

/**

* 判断索引index是否超出数组范围

* @param $index

* @return bool

*/

private function checkOutOfRange($index)

{

if($index >= $this->length) {

return true;

}

return false;

}

/**

* 在索引index位置插入值value，返回错误码，0为插入成功

* @param $index

* @param $value

* @return int

*/

public function insert($index, $value)

{

$index = intval($index);

$value = intval($value);

if ($index < 0) {

return 1;

}

if ($this->checkIfFull()) {

return 2;

}

for ($i = $this->length - 1; $i >= $index; $i--) {

$this->data[$i + 1] = $this->data[$i];

}

$this->data[$index] = $value;

$this->length++;

return 0;

}

/**

* 删除索引index上的值，并返回

* @param $index

* @return array

*/

public function delete($index)

{

$value = 0;

$index = intval($index);

if ($index < 0) {

$code = 1;

return [$code, $value];

}

if ($this->checkOutOfRange($index)) {

$code = 2;

return [$code, $value];

}

$value = $this->data[$index];

for ($i = $index; $i < $this->length - 1; $i++) {

$this->data[$i] = $this->data[$i + 1];

}

$this->length--;

return [0, $value];

}

/**

* 查找索引index的值

* @param $index

* @return array

*/

public function find($index)

{

$value = 0;

$index = intval($index);

if ($index < 0) {

$code = 1;

return [$code, $value];

}

if ($this->checkOutOfRange($index)) {

$code = 2;

return [$code, $value];

}

return [0, $this->data[$index]];

}

public function printData()

{

$format = "";

for ($i = 0; $i < $this->length; $i++) {

$format .= "|" . $this->data[$i];

}

print($format . "\n");

}

}