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JavaScript Float64Array : ArrayBufferView

Float64Array is similar to an Array where each item is a 64 bit (8 byte) floating point number (the same as the standard Number type). Float64Arrays cannot change size after creation.

Constructors

new Float64Array(length : Number) : Float64Array

Creates a new Float64Array of the specified length where each item starts out as 0.

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new Float64Array(array : Array) : Float64Array

Creates a new Float64Array and copies the items of array into this.

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new Float64Array(array : Float64Array) : Float64Array

Creates a new Float64Array and copies the items of array into this. array can be any of the typed array types and the copied items will be converted to 64 bit floating point numbers before being stored in this.

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new Float64Array(buffer : ArrayBuffer, [byteOffset = 0 : Number, [length : Number]]) : Float64Array

Creates a view on top of the specified buffer starting at byteOffset of length items. Changes to the items in this actual affect the underlying buffer, and vice versa. byteOffset must be a multiple of 8. (Use DataView for unaligned data.) If length is not specified, buffer.length - byteOffset must be a multiple of 8 and this.length will be (buffer.length - byteOffset) / 8.

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Instance Indexers

this[index : Number] : Number

Gets and sets the element in this at index. index should be between 0 and this.length - 1.

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Instance Properties

buffer : ArrayBuffer

Returns the underlying buffer for this Float64Array.

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byteLength : Number

The length of this in bytes.

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byteOffset : Number

The offset into this.buffer where the 0th item is stored.

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length : Number  

The number of elements in this. It is 1 greater than the index of the last item.

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Instance Methods

set 2 variants
set(array : Array, [offset = 0 : Number]) : undefined

Copies items from array into this starting at this[offset]. Copied items are converted to 64 bit floating point numbers before storing in this.

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set(array : Float64Array, [offset = 0 : Number]) : undefined

Copies items from array into this starting at this[offset]. array can be any of the typed array types and the copied items will be converted to 64 bit floating point numbers before storing in this.

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subarray(begin : Number, [end : Number]) : Float64Array

Returns a new Float64Array that is a view on top of this containing items this[begin], this[begin + 1], ..., this[end - 1]. The 0th item in the returned array in the same memory location as this[begin]. If end is not specified, this.length is used.

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Float64Array Properties

BYTES_PER_ELEMENT : Number

Returns the size in bytes of an item in a Float64Array.

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