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cc3fc18076
* added packages reference menu item. * removed the draft flag. * Updated docs by running script.
165 lines
4.7 KiB
Markdown
165 lines
4.7 KiB
Markdown
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# -----------------------------------------------------------------------
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# Do not edit this file. It is automatically generated by API Documenter.
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# -----------------------------------------------------------------------
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title = "DataFrameView"
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keywords = ["grafana","documentation","sdk","@grafana/data"]
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type = "docs"
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## DataFrameView class
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> This API is provided as a preview for developers and may change based on feedback that we receive. Do not use this API in a production environment.
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>
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This abstraction will present the contents of a DataFrame as if it were a well typed javascript object Vector.
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<b>Signature</b>
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```typescript
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export declare class DataFrameView<T = any> extends FunctionalVector<T>
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```
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<b>Import</b>
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```typescript
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import { DataFrameView } from '@grafana/data';
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```
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## Remarks
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The [DataFrameView.get()](./data/dataframeview/get.md) is optimized for use in a loop and will return same object. See function for more details.
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<b>Constructors</b>
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| Constructor | Modifiers | Description |
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| --- | --- | --- |
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| [constructor(data)](#constructor-data) | | <b><i>(BETA)</i></b> Constructs a new instance of the <code>DataFrameView</code> class |
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<b>Properties</b>
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| Property | Modifiers | Type | Description |
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| --- | --- | --- | --- |
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| [dataFrame](#dataframe-property) | | <code>DataFrame</code> | <b><i>(BETA)</i></b> |
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| [length](#length-property) | | <code>number</code> | <b><i>(BETA)</i></b> |
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<b>Methods</b>
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| Method | Modifiers | Description |
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| --- | --- | --- |
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| [get(idx)](#get-method) | | <b><i>(BETA)</i></b> The contents of the object returned from this function are optimized for use in a loop. All calls return the same object but the index has changed. |
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| [getFieldDisplayProcessor(colIndex)](#getfielddisplayprocessor-method) | | <b><i>(BETA)</i></b> Helper function to return the [DisplayProcessor](./data/displayprocessor.md) for a given field column. |
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| [toArray()](#toarray-method) | | <b><i>(BETA)</i></b> |
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> This API is provided as a preview for developers and may change based on feedback that we receive. Do not use this API in a production environment.
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>
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### constructor(data)
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Constructs a new instance of the `DataFrameView` class
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<b>Signature</b>
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```typescript
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constructor(data: DataFrame);
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```
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<b>Parameters</b>
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| Parameter | Type | Description |
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| --- | --- | --- |
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| data | <code>DataFrame</code> | |
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> This API is provided as a preview for developers and may change based on feedback that we receive. Do not use this API in a production environment.
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>
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### dataFrame property
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<b>Signature</b>
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```typescript
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get dataFrame(): DataFrame;
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```
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> This API is provided as a preview for developers and may change based on feedback that we receive. Do not use this API in a production environment.
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>
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### length property
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<b>Signature</b>
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```typescript
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get length(): number;
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```
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> This API is provided as a preview for developers and may change based on feedback that we receive. Do not use this API in a production environment.
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>
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### get method
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The contents of the object returned from this function are optimized for use in a loop. All calls return the same object but the index has changed.
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<b>Signature</b>
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```typescript
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get(idx: number): T;
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```
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<b>Parameters</b>
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| Parameter | Type | Description |
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| --- | --- | --- |
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| idx | <code>number</code> | The index of the object you currently are inspecting |
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<b>Returns:</b>
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`T`
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## Example
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```typescript
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// `first`, `second` and `third` will all point to the same contents at index 2:
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const first = view.get(0);
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const second = view.get(1);
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const third = view.get(2);
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// If you need three different objects, consider something like:
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const first = { ...view.get(0) };
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const second = { ...view.get(1) };
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const third = { ...view.get(2) };
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```
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> This API is provided as a preview for developers and may change based on feedback that we receive. Do not use this API in a production environment.
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>
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### getFieldDisplayProcessor method
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Helper function to return the [DisplayProcessor](./data/displayprocessor.md) for a given field column.
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<b>Signature</b>
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```typescript
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getFieldDisplayProcessor(colIndex: number): DisplayProcessor | null;
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```
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<b>Parameters</b>
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| Parameter | Type | Description |
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| --- | --- | --- |
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| colIndex | <code>number</code> | the field column index for the data frame. |
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<b>Returns:</b>
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`DisplayProcessor | null`
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> This API is provided as a preview for developers and may change based on feedback that we receive. Do not use this API in a production environment.
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>
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### toArray method
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<b>Signature</b>
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```typescript
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toArray(): T[];
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```
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<b>Returns:</b>
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`T[]`
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