Count number of write operations in the bulk

# MongoDB\Driver\BulkWrite::count

(mongodb >=1.0.0)

MongoDB\Driver\BulkWrite::count — Count number of write operations in the bulk

### 説明

public MongoDB\Driver\BulkWrite::count ( void ) : int

Returns the number of write operations added to the MongoDB\Driver\BulkWrite object.

### パラメータ

この関数にはパラメータはありません。

### 返り値

Returns number of write operations added to the MongoDB\Driver\BulkWrite object.

### エラー / 例外

- 引数のパースに失敗した場合に MongoDB\Driver\Exception\InvalidArgumentException をスローします。

### 変更履歴

バージョン | 説明
--- | ---
1.2.0 | Returns the number of write operations added to the MongoDB\Driver\BulkWrite object. Earlier versions returned the expected number of client-to-server roundtrips required to execute all write operations.

### 例

例1 MongoDB\Driver\BulkWrite::count() example

`<?php
$bulk = new MongoDB\Driver\BulkWrite;
$bulk->insert(['_id' => 1, 'x' => 1]);
$bulk->insert(['_id' => 2, 'x' => 2]);
$bulk->update(['x' => 2], ['$set' => ['x' => 1]]);
$bulk->delete(['x' => 1]);
var_dump(count($bulk));
?>`

上の例の出力は以下となります。

    int(4)