napi_create_array_with_length

napi_status napi_create_array_with_length(napi_env env,
                                          size_t length,
                                          napi_value* result) 拷贝

• [in] env：调用 API 的环境。

  ¥[in] env: The environment that the API is invoked under.

• [in] length：Array 的初始长度。

  ¥[in] length: The initial length of the Array.

• [out] result：代表 JavaScript Array 的 napi_value。

  ¥[out] result: A napi_value representing a JavaScript Array.

如果 API 成功，则返回 napi_ok。

¥Returns napi_ok if the API succeeded.

此 API 返回对应于 JavaScript Array 类型的 Node-API 值。Array 的长度属性设置为传入的长度参数。但是，不保证底层缓冲区在创建数组时由 VM 预先分配。该行为留给底层 VM 实现。如果缓冲区必须是可以通过 C 直接读取和/或写入的连续内存块，请考虑使用 napi_create_external_arraybuffer。

¥This API returns a Node-API value corresponding to a JavaScript Array type. The Array's length property is set to the passed-in length parameter. However, the underlying buffer is not guaranteed to be pre-allocated by the VM when the array is created. That behavior is left to the underlying VM implementation. If the buffer must be a contiguous block of memory that can be directly read and/or written via C, consider using napi_create_external_arraybuffer.

JavaScript 数组在 ECMAScript 语言规范的 数组对象部分 中进行了描述。

¥JavaScript arrays are described in Section Array objects of the ECMAScript Language Specification.