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Array

Class [Napi::Array][] inherits from class Napi::Object.

Arrays are native representations of JavaScript Arrays. Napi::Array is a wrapper around napi_value representing a JavaScript Array.

Napi::TypedArray and Napi::ArrayBuffer correspond to JavaScript data types such as Napi::Int32Array and Napi::ArrayBuffer, respectively, that can be used for transferring large amounts of data from JavaScript to the native side. An example illustrating the use of a JavaScript-provided ArrayBuffer in native code is available here.

Constructor

Napi::Array::Array();

Returns an empty array.

If an error occurs, a Napi::Error will be thrown. If C++ exceptions are not being used, callers should check the result of Env::IsExceptionPending before attempting to use the returned value.

Napi::Array::Array(napi_env env, napi_value value);
  • [in] env - The environment in which to create the array.
  • [in] value - The primitive to wrap.

Returns a Napi::Array wrapping a napi_value.

If an error occurs, a Napi::Error will get thrown. If C++ exceptions are not being used, callers should check the result of Env::IsExceptionPending before attempting to use the returned value.

Methods

New

static Napi::Array Napi::Array::New(napi_env env);
  • [in] env - The environment in which to create the array.

Returns a new Napi::Array.

If an error occurs, a Napi::Error will get thrown. If C++ exceptions are not being used, callers should check the result of Env::IsExceptionPending before attempting to use the returned value.

New

static Napi::Array Napi::Array::New(napi_env env, size_t length);
  • [in] env - The environment in which to create the array.
  • [in] length - The length of the array.

Returns a new Napi::Array with the given length.

If an error occurs, a Napi::Error will get thrown. If C++ exceptions are not being used, callers should check the result of Env::IsExceptionPending before attempting to use the returned value.

Length

uint32_t Napi::Array::Length() const;

Returns the length of the array.

Note: This can execute JavaScript code implicitly according to JavaScript semantics. If an error occurs, a Napi::Error will get thrown. If C++ exceptions are not being used, callers should check the result of Env::IsExceptionPending before attempting to use the returned value.