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VISUALIZACION/node_modules/node-addon-api/doc/dataview.md
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VISUALIZACION/node_modules/node-addon-api/doc/dataview.md
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# DataView
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The `Napi::DataView` class corresponds to the
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[JavaScript `DataView`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView)
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class.
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## Methods
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### New
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Allocates a new `Napi::DataView` instance with a given `Napi::ArrayBuffer`.
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```cpp
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static Napi::DataView Napi::DataView::New(napi_env env, Napi::ArrayBuffer arrayBuffer);
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```
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- `[in] env`: The environment in which to create the `Napi::DataView` instance.
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- `[in] arrayBuffer` : `Napi::ArrayBuffer` underlying the `Napi::DataView`.
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Returns a new `Napi::DataView` instance.
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### New
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Allocates a new `Napi::DataView` instance with a given `Napi::ArrayBuffer`.
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```cpp
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static Napi::DataView Napi::DataView::New(napi_env env, Napi::ArrayBuffer arrayBuffer, size_t byteOffset);
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```
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- `[in] env`: The environment in which to create the `Napi::DataView` instance.
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- `[in] arrayBuffer` : `Napi::ArrayBuffer` underlying the `Napi::DataView`.
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- `[in] byteOffset` : The byte offset within the `Napi::ArrayBuffer` from which to start projecting the `Napi::DataView`.
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Returns a new `Napi::DataView` instance.
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### New
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Allocates a new `Napi::DataView` instance with a given `Napi::ArrayBuffer`.
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```cpp
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static Napi::DataView Napi::DataView::New(napi_env env, Napi::ArrayBuffer arrayBuffer, size_t byteOffset, size_t byteLength);
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```
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- `[in] env`: The environment in which to create the `Napi::DataView` instance.
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- `[in] arrayBuffer` : `Napi::ArrayBuffer` underlying the `Napi::DataView`.
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- `[in] byteOffset` : The byte offset within the `Napi::ArrayBuffer` from which to start projecting the `Napi::DataView`.
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- `[in] byteLength` : Number of elements in the `Napi::DataView`.
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Returns a new `Napi::DataView` instance.
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### Constructor
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Initializes an empty instance of the `Napi::DataView` class.
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```cpp
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Napi::DataView();
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```
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### Constructor
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Initializes a wrapper instance of an existing `Napi::DataView` instance.
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```cpp
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Napi::DataView(napi_env env, napi_value value);
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```
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- `[in] env`: The environment in which to create the `Napi::DataView` instance.
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- `[in] value`: The `Napi::DataView` reference to wrap.
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### ArrayBuffer
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```cpp
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Napi::ArrayBuffer Napi::DataView::ArrayBuffer() const;
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```
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Returns the backing array buffer.
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### ByteOffset
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```cpp
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size_t Napi::DataView::ByteOffset() const;
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```
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Returns the offset into the `Napi::DataView` where the array starts, in bytes.
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### ByteLength
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```cpp
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size_t Napi::DataView::ByteLength() const;
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```
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Returns the length of the array, in bytes.
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### GetFloat32
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```cpp
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float Napi::DataView::GetFloat32(size_t byteOffset) const;
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```
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- `[in] byteOffset`: The offset, in byte, from the start of the view where to read the data.
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Returns a signed 32-bit float (float) at the specified byte offset from the start of the `Napi::DataView`.
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### GetFloat64
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```cpp
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double Napi::DataView::GetFloat64(size_t byteOffset) const;
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```
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- `[in] byteOffset`: The offset, in byte, from the start of the view where to read the data.
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Returns a signed 64-bit float (double) at the specified byte offset from the start of the `Napi::DataView`.
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### GetInt8
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```cpp
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int8_t Napi::DataView::GetInt8(size_t byteOffset) const;
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```
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- `[in] byteOffset`: The offset, in byte, from the start of the view where to read the data.
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Returns a signed 8-bit integer (byte) at the specified byte offset from the start of the `Napi::DataView`.
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### GetInt16
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```cpp
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int16_t Napi::DataView::GetInt16(size_t byteOffset) const;
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```
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- `[in] byteOffset`: The offset, in byte, from the start of the view where to read the data.
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Returns a signed 16-bit integer (short) at the specified byte offset from the start of the `Napi::DataView`.
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### GetInt32
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```cpp
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int32_t Napi::DataView::GetInt32(size_t byteOffset) const;
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```
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- `[in] byteOffset`: The offset, in byte, from the start of the view where to read the data.
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Returns a signed 32-bit integer (long) at the specified byte offset from the start of the `Napi::DataView`.
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### GetUint8
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```cpp
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uint8_t Napi::DataView::GetUint8(size_t byteOffset) const;
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```
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- `[in] byteOffset`: The offset, in byte, from the start of the view where to read the data.
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Returns a unsigned 8-bit integer (unsigned byte) at the specified byte offset from the start of the `Napi::DataView`.
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### GetUint16
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```cpp
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uint16_t Napi::DataView::GetUint16(size_t byteOffset) const;
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```
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- `[in] byteOffset`: The offset, in byte, from the start of the view where to read the data.
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Returns a unsigned 16-bit integer (unsigned short) at the specified byte offset from the start of the `Napi::DataView`.
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### GetUint32
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```cpp
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uint32_t Napi::DataView::GetUint32(size_t byteOffset) const;
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```
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- `[in] byteOffset`: The offset, in byte, from the start of the view where to read the data.
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Returns a unsigned 32-bit integer (unsigned long) at the specified byte offset from the start of the `Napi::DataView`.
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### SetFloat32
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```cpp
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void Napi::DataView::SetFloat32(size_t byteOffset, float value) const;
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```
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- `[in] byteOffset`: The offset, in byte, from the start of the view where to read the data.
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- `[in] value`: The value to set.
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### SetFloat64
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```cpp
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void Napi::DataView::SetFloat64(size_t byteOffset, double value) const;
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```
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- `[in] byteOffset`: The offset, in byte, from the start of the view where to read the data.
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- `[in] value`: The value to set.
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### SetInt8
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```cpp
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void Napi::DataView::SetInt8(size_t byteOffset, int8_t value) const;
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```
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- `[in] byteOffset`: The offset, in byte, from the start of the view where to read the data.
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- `[in] value`: The value to set.
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### SetInt16
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```cpp
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void Napi::DataView::SetInt16(size_t byteOffset, int16_t value) const;
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```
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- `[in] byteOffset`: The offset, in byte, from the start of the view where to read the data.
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- `[in] value`: The value to set.
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### SetInt32
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```cpp
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void Napi::DataView::SetInt32(size_t byteOffset, int32_t value) const;
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```
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- `[in] byteOffset`: The offset, in byte, from the start of the view where to read the data.
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- `[in] value`: The value to set.
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### SetUint8
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```cpp
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void Napi::DataView::SetUint8(size_t byteOffset, uint8_t value) const;
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```
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- `[in] byteOffset`: The offset, in byte, from the start of the view where to read the data.
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- `[in] value`: The value to set.
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### SetUint16
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```cpp
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void Napi::DataView::SetUint16(size_t byteOffset, uint16_t value) const;
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```
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- `[in] byteOffset`: The offset, in byte, from the start of the view where to read the data.
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- `[in] value`: The value to set.
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### SetUint32
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```cpp
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void Napi::DataView::SetUint32(size_t byteOffset, uint32_t value) const;
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```
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- `[in] byteOffset`: The offset, in byte, from the start of the view where to read the data.
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- `[in] value`: The value to set.
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