repl.txt

{{alias}}()
    A typed array constructor which returns a typed array representing an array
    of double-precision floating-point numbers in the platform byte order.

    Returns
    -------
    out: Float64Array
        A typed array.

    Examples
    --------
    > var arr = new {{alias}}()
    <Float64Array>


{{alias}}( length )
    Returns a typed array having a specified length.

    Parameters
    ----------
    length: integer
        Typed array length.

    Returns
    -------
    out: Float64Array
        A typed array.

    Examples
    --------
    > var arr = new {{alias}}( 5 )
    <Float64Array>[ 0.0, 0.0, 0.0, 0.0, 0.0 ]


{{alias}}( typedarray )
    Creates a typed array from another typed array.

    Parameters
    ----------
    typedarray: TypedArray
        Typed array from which to generate another typed array.

    Returns
    -------
    out: Float64Array
        A typed array.

    Examples
    --------
    > var arr1 = new {{alias:@stdlib/array/float32}}( [ 0.5, 0.5, 0.5 ] );
    > var arr2 = new {{alias}}( arr1 )
    <Float64Array>[ 0.5, 0.5, 0.5 ]


{{alias}}( obj )
    Creates a typed array from an array-like object or iterable.

    Parameters
    ----------
    obj: Object
        Array-like object or iterable from which to generate a typed array.

    Returns
    -------
    out: Float64Array
        A typed array.

    Examples
    --------
    > var arr1 = [ 0.5, 0.5, 0.5 ];
    > var arr2 = new {{alias}}( arr1 )
    <Float64Array>[ 0.5, 0.5, 0.5 ]


{{alias}}( buffer[, byteOffset[, length]] )
    Returns a typed array view of an ArrayBuffer.

    Parameters
    ----------
    buffer: ArrayBuffer
        Underlying ArrayBuffer.

    byteOffset: integer (optional)
        Integer byte offset specifying the location of the first typed array
        element. Default: 0.

    length: integer (optional)
        View length. If not provided, the view spans from the byteOffset to
        the end of the underlying ArrayBuffer.

    Returns
    -------
    out: Float64Array
        A typed array.

    Examples
    --------
    > var buf = new {{alias:@stdlib/array/buffer}}( 32 );
    > var arr = new {{alias}}( buf, 0, 4 )
    <Float64Array>[ 0.0, 0.0, 0.0, 0.0 ]


{{alias}}.from( src[, map[, thisArg]] )
    Creates a new typed array from an array-like object or an iterable.

    A callback is provided the following arguments:

    - value: source value.
    - index: source index.

    Parameters
    ----------
    src: ArrayLike|Iterable
        Source of array elements.

    map: Function (optional)
        Callback to invoke for each source element.

    thisArg: Any (optional)
        Callback execution context.

    Returns
    -------
    out: Float64Array
        A typed array.

    Examples
    --------
    > function mapFcn( v ) { return v * 2.0; };
    > var arr = {{alias}}.from( [ 1.0, -1.0 ], mapFcn )
    <Float64Array>[ 2.0, -2.0 ]


{{alias}}.of( element0[, element1[, ...elementN]] )
    Creates a new typed array from a variable number of arguments.

    Parameters
    ----------
    element0: number
        Array element.

    element1: number (optional)
        Array element.

    elementN: ...number (optional)
        Array elements.

    Returns
    -------
    out: Float64Array
        A typed array.

    Examples
    --------
    > var arr = {{alias}}.of( 2.0, -2.0 )
    <Float64Array>[ 2.0, -2.0 ]


{{alias}}.BYTES_PER_ELEMENT
    Number of bytes per view element.

    Examples
    --------
    > {{alias}}.BYTES_PER_ELEMENT
    8


{{alias}}.name
    Typed array constructor name.

    Examples
    --------
    > {{alias}}.name
    'Float64Array'


{{alias}}.prototype.buffer
    Read-only property which returns the ArrayBuffer referenced by the typed
    array.

    Examples
    --------
    > var arr = new {{alias}}( 5 );
    > arr.buffer
    <ArrayBuffer>


{{alias}}.prototype.byteLength
    Read-only property which returns the length (in bytes) of the typed array.

    Examples
    --------
    > var arr = new {{alias}}( 5 );
    > arr.byteLength
    40


{{alias}}.prototype.byteOffset
    Read-only property which returns the offset (in bytes) of the typed array
    from the start of its ArrayBuffer.

    Examples
    --------
    > var arr = new {{alias}}( 5 );
    > arr.byteOffset
    0


{{alias}}.prototype.BYTES_PER_ELEMENT
    Number of bytes per view element.

    Examples
    --------
    > var arr = new {{alias}}( 5 );
    > arr.BYTES_PER_ELEMENT
    8


{{alias}}.prototype.length
    Read-only property which returns the number of view elements.

    Examples
    --------
    > var arr = new {{alias}}( 5 );
    > arr.length
    5


{{alias}}.prototype.copyWithin( target, start[, end] )
    Copies a sequence of elements within the array starting at `start` and
    ending at `end` (non-inclusive) to the position starting at `target`.

    Parameters
    ----------
    target: integer
        Target start index position.

    start: integer
        Source start index position.

    end: integer (optional)
        Source end index position. Default: out.length.

    Returns
    -------
    out: Float64Array
        Modified array.

    Examples
    --------
    > var arr = new {{alias}}( [ 2.0, -2.0, 1.0, -1.0, 1.0 ] );
    > arr.copyWithin( 3, 0, 2 );
    > arr[ 3 ]
    2.0
    > arr[ 4 ]
    -2.0


{{alias}}.prototype.entries()
    Returns an iterator for iterating over array key-value pairs.

    Returns
    -------
    iter: Iterator
        Iterator for iterating over array key-value pairs.

    Examples
    --------
    > var arr = new {{alias}}( [ 1.0, -1.0 ] );
    > it = arr.entries();
    > it.next().value
    [ 0, 1.0 ]
    > it.next().value
    [ 1, -1.0 ]
    > it.next().done
    true


{{alias}}.prototype.every( predicate[, thisArg] )
    Tests whether all array elements pass a test implemented by a predicate
    function.

    A predicate function is provided the following arguments:

    - value: array element.
    - index: array index.
    - arr: array on which the method is invoked.

    Parameters
    ----------
    predicate: Function
        Predicate function which tests array elements. If a predicate function
        returns a truthy value, an array element passes; otherwise, an array
        element fails.

    thisArg: Any (optional)
        Callback execution context.

    Returns
    -------
    bool: boolean
        Boolean indicating whether all array elements pass.

    Examples
    --------
    > var arr = new {{alias}}( [ 1.0, -1.0 ] );
    > function predicate( v ) { return ( v >= 0.0 ); };
    > arr.every( predicate )
    false


{{alias}}.prototype.fill( value[, start[, end]] )
    Fills an array from a start index to an end index (non-inclusive) with a
    provided value.

    Parameters
    ----------
    value: number
        Fill value.

    start: integer (optional)
        Start index. If less than zero, the start index is resolved relative to
        the last array element. Default: 0.

    end: integer (optional)
        End index (non-inclusive). If less than zero, the end index is resolved
        relative to the last array element. Default: out.length.

    Returns
    -------
    out: Float64Array
        Modified array.

    Examples
    --------
    > var arr = new {{alias}}( [ 1.0, -1.0 ] );
    > arr.fill( 2.0 );
    > arr[ 0 ]
    2.0
    > arr[ 1 ]
    2.0


{{alias}}.prototype.filter( predicate[, thisArg] )
    Creates a new array which includes those elements for which a predicate
    function returns a truthy value.

    A predicate function is provided the following arguments:

    - value: array element.
    - index: array index.
    - arr: array on which the method is invoked.

    The returned array has the same data type as the host array.

    If a predicate function does not return a truthy value for any array
    element, the method returns `null`.

    Parameters
    ----------
    predicate: Function
        Predicate function which filters array elements. If a predicate function
        returns a truthy value, an array element is included in the output
        array; otherwise, an array element is not included in the output array.

    thisArg: Any (optional)
        Callback execution context.

    Returns
    -------
    out: Float64Array
        A typed array.

    Examples
    --------
    > var arr1 = new {{alias}}( [ 1.0, 0.0, -1.0 ] );
    > function predicate( v ) { return ( v >= 0.0 ); };
    > var arr2 = arr1.filter( predicate );
    > arr2.length
    2


{{alias}}.prototype.find( predicate[, thisArg] )
    Returns the first array element for which a provided predicate function
    returns a truthy value.

    A predicate function is provided the following arguments:

    - value: array element.
    - index: array index.
    - arr: array on which the method is invoked.

    If a predicate function never returns a truthy value, the method returns
    `undefined`.

    Parameters
    ----------
    predicate: Function
        Predicate function which tests array elements.

    thisArg: Any (optional)
        Callback execution context.

    Returns
    -------
    value: number|undefined
        Array element.

    Examples
    --------
    > var arr = new {{alias}}( [ 1.0, 0.0, -1.0 ] );
    > function predicate( v ) { return ( v < 0.0 ); };
    > var v = arr.find( predicate )
    -1.0


{{alias}}.prototype.findIndex( predicate[, thisArg] )
    Returns the index of the first array element for which a provided predicate
    function returns a truthy value.

    A predicate function is provided the following arguments:

    - value: array element.
    - index: array index.
    - arr: array on which the method is invoked.

    If a predicate function never returns a truthy value, the method returns
    `-1`.

    Parameters
    ----------
    predicate: Function
        Predicate function which tests array elements.

    thisArg: Any (optional)
        Callback execution context.

    Returns
    -------
    idx: integer
        Array index.

    Examples
    --------
    > var arr = new {{alias}}( [ 1.0, 0.0, -1.0 ] );
    > function predicate( v ) { return ( v < 0.0 ); };
    > var idx = arr.findIndex( predicate )
    2


{{alias}}.prototype.forEach( fcn[, thisArg] )
    Invokes a callback for each array element.

    A provided function is provided the following arguments:

    - value: array element.
    - index: array index.
    - arr: array on which the method is invoked.

    Parameters
    ----------
    fcn: Function
        Function to invoke for each array element.

    thisArg: Any (optional)
        Callback execution context.

    Examples
    --------
    > var arr = new {{alias}}( [ 1.0, 0.0, -1.0 ] );
    > var str = ' ';
    > function fcn( v, i ) { str += i + ':' + v + ' '; };
    > arr.forEach( fcn );
    > str
    ' 0:1 1:0 2:-1 '


{{alias}}.prototype.includes( searchElement[, fromIndex] )
    Returns a boolean indicating whether an array includes a search element.

    The method does not distinguish between signed and unsigned zero.

    Parameters
    ----------
    searchElement: number
        Search element.

    fromIndex: integer (optional)
        Array index from which to begin searching. If provided a negative value,
        the method resolves the start index relative to the last array element.
        Default: 0.

    Returns
    -------
    bool: boolean
        Boolean indicating whether an array includes a search element.

    Examples
    --------
    > var arr = new {{alias}}( [ 1.0, 0.0, -1.0 ] );
    > var bool = arr.includes( 2.0 )
    false
    > bool = arr.includes( -1.0 )
    true


{{alias}}.prototype.indexOf( searchElement[, fromIndex] )
    Returns the index of the first array element strictly equal to a search
    element.

    The method does not distinguish between signed and unsigned zero.

    If unable to locate a search element, the method returns `-1`.

    Parameters
    ----------
    searchElement: number
        Search element.

    fromIndex: integer (optional)
        Array index from which to begin searching. If provided a negative value,
        the method resolves the start index relative to the last array element.
        Default: 0.

    Returns
    -------
    idx: integer
        Array index.

    Examples
    --------
    > var arr = new {{alias}}( [ 1.0, 0.0, -1.0 ] );
    > var idx = arr.indexOf( 2.0 )
    -1
    > idx = arr.indexOf( -1.0 )
    2


{{alias}}.prototype.join( [separator] )
    Serializes an array by joining all array elements as a string.

    Parameters
    ----------
    separator: string (optional)
        String delineating array elements. Default: ','.

    Returns
    -------
    str: string
        Array serialized as a string.

    Examples
    --------
    > var arr = new {{alias}}( [ 1.0, 0.0, -1.0 ] );
    > arr.join( '|' )
    '1|0|-1'


{{alias}}.prototype.keys()
    Returns an iterator for iterating over array keys.

    Returns
    -------
    iter: Iterator
        Iterator for iterating over array keys.

    Examples
    --------
    > var arr = new {{alias}}( [ 1.0, -1.0 ] );
    > it = arr.keys();
    > it.next().value
    0
    > it.next().value
    1
    > it.next().done
    true


{{alias}}.prototype.lastIndexOf( searchElement[, fromIndex] )
    Returns the index of the last array element strictly equal to a search
    element.

    The method iterates from the last array element to the first array element.

    The method does not distinguish between signed and unsigned zero.

    If unable to locate a search element, the method returns `-1`.

    Parameters
    ----------
    searchElement: number
        Search element.

    fromIndex: integer (optional)
        Array index from which to begin searching. If provided a negative value,
        the method resolves the start index relative to the last array element.
        Default: -1.

    Returns
    -------
    idx: integer
        Array index.

    Examples
    --------
    > var arr = new {{alias}}( [ 1.0, 0.0, -1.0, 0.0, 1.0 ] );
    > var idx = arr.lastIndexOf( 2.0 )
    -1
    > idx = arr.lastIndexOf( 0.0 )
    3


{{alias}}.prototype.map( fcn[, thisArg] )
    Maps each array element to an element in a new typed array.

    A provided function is provided the following arguments:

    - value: array element.
    - index: array index.
    - arr: array on which the method is invoked.

    The returned array has the same data type as the host array.

    Parameters
    ----------
    fcn: Function
        Function which maps array elements to elements in the new array.

    thisArg: Any (optional)
        Callback execution context.

    Returns
    -------
    out: Float64Array
        A typed array.

    Examples
    --------
    > var arr1 = new {{alias}}( [ 1.0, 0.0, -1.0 ] );
    > function fcn( v ) { return v * 2.0; };
    > var arr2 = arr1.map( fcn )
    <Float64Array>[ 2.0, 0.0, -2.0 ]


{{alias}}.prototype.reduce( fcn[, initialValue] )
    Applies a function against an accumulator and each element in an array and
    returns the accumulated result.

    The provided function is provided the following arguments:

    - acc: accumulated result.
    - value: current array element.
    - index: index of the current array element.
    - arr: array on which the method is invoked.

    If provided an initial value, the method invokes a provided function with
    the initial value as the first argument and the first array element as the
    second argument.

    If not provided an initial value, the method invokes a provided function
    with the first array element as the first argument and the second array
    element as the second argument.

    Parameters
    ----------
    fcn: Function
        Function to apply.

    initialValue: Any (optional)
        Initial accumulation value.

    Returns
    -------
    out: Any
        Accumulated result.

    Examples
    --------
    > var arr = new {{alias}}( [ 1.0, 0.0, -1.0 ] );
    > function fcn( acc, v ) { return acc + (v*v); };
    > var v = arr.reduce( fcn, 0.0 )
    2.0


{{alias}}.prototype.reduceRight( fcn[, initialValue] )
    Applies a function against an accumulator and each element in an array and
    returns the accumulated result, iterating from right to left.

    The provided function is provided the following arguments:

    - acc: accumulated result.
    - value: current array element.
    - index: index of the current array element.
    - arr: array on which the method is invoked.

    If provided an initial value, the method invokes a provided function with
    the initial value as the first argument and the last array element as the
    second argument.

    If not provided an initial value, the method invokes a provided function
    with the last array element as the first argument and the second-to-last
    array element as the second argument.

    Parameters
    ----------
    fcn: Function
        Function to apply.

    initialValue: Any (optional)
        Initial accumulation value.

    Returns
    -------
    out: Any
        Accumulated result.

    Examples
    --------
    > var arr = new {{alias}}( [ 1.0, 0.0, -1.0 ] );
    > function fcn( acc, v ) { return acc + (v*v); };
    > var v = arr.reduceRight( fcn, 0.0 )
    2.0


{{alias}}.prototype.reverse()
    Reverses an array *in-place*.

    This method mutates the array on which the method is invoked.

    Returns
    -------
    out: Float64Array
        Modified array.

    Examples
    --------
    > var arr = new {{alias}}( [ 1.0, 0.0, -1.0 ] )
    <Float64Array>
    > arr.reverse()
    <Float64Array>[ -1.0, 0.0, 1.0 ]


{{alias}}.prototype.set( arr[, offset] )
    Sets array elements.

    Parameters
    ----------
    arr: ArrayLike
        Source array containing array values to set.

    offset: integer (optional)
        Array index at which to start writing values. Default: 0.

    Examples
    --------
    > var arr = new {{alias}}( [ 1.0, 0.0, -1.0 ] );
    > arr.set( [ -2.0, 2.0 ], 1 );
    > arr[ 1 ]
    -2.0
    > arr[ 2 ]
    2.0


{{alias}}.prototype.slice( [begin[, end]] )
    Copies array elements to a new array with the same underlying data type as
    the host array.

    If the method is unable to resolve indices to a non-empty array subsequence,
    the method returns `null`.

    Parameters
    ----------
    begin: integer (optional)
        Start element index (inclusive). If less than zero, the start index is
        resolved relative to the last array element. Default: 0.

    end: integer (optional)
        End element index (exclusive). If less than zero, the end index is
        resolved relative to the last array element. Default: arr.length.

    Returns
    -------
    out: Float64Array
        A typed array.

    Examples
    --------
    > var arr1 = new {{alias}}( [ 1.0, 0.0, -1.0 ] );
    > var arr2 = arr1.slice( 1 );
    > arr2.length
    2
    > arr2[ 0 ]
    0.0
    > arr2[ 1 ]
    -1.0


{{alias}}.prototype.some( predicate[, thisArg] )
    Tests whether at least one array element passes a test implemented by a
    predicate function.

    A predicate function is provided the following arguments:

    - value: array element.
    - index: array index.
    - arr: array on which the method is invoked.

    Parameters
    ----------
    predicate: Function
        Predicate function which tests array elements. If a predicate function
        returns a truthy value, a array element passes; otherwise, an array
        element fails.

    thisArg: Any (optional)
        Callback execution context.

    Returns
    -------
    bool: boolean
        Boolean indicating whether at least one array element passes.

    Examples
    --------
    > var arr = new {{alias}}( [ 1.0, -1.0 ] );
    > function predicate( v ) { return ( v < 0.0 ); };
    > arr.some( predicate )
    true


{{alias}}.prototype.sort( [compareFunction] )
    Sorts an array *in-place*.

    The comparison function is provided two array elements per invocation: `a`
    and `b`.

    The comparison function return value determines the sort order as follows:

    - If the comparison function returns a value less than zero, then the method
    sorts `a` to an index lower than `b` (i.e., `a` should come *before* `b`).

    - If the comparison function returns a value greater than zero, then the
    method sorts `a` to an index higher than `b` (i.e., `b` should come *before*
    `a`).

    - If the comparison function returns zero, then the relative order of `a`
    and `b` should remain unchanged.

    This method mutates the array on which the method is invoked.

    Parameters
    ----------
    compareFunction: Function (optional)
        Function which specifies the sort order. The default sort order is
        ascending order.

    Returns
    -------
    out: Float64Array
        Modified array.

    Examples
    --------
    > var arr = new {{alias}}( [ 1.0, -1.0, 0.0, 2.0, -2.0 ] );
    > arr.sort()
    <Float64Array>[ -2.0, -1.0, 0.0, 1.0, 2.0 ]


{{alias}}.prototype.subarray( [begin[, end]] )
    Creates a new typed array over the same underlying ArrayBuffer and with the
    same underlying data type as the host array.

    If the method is unable to resolve indices to a non-empty array subsequence,
    the method returns an empty typed array.

    Parameters
    ----------
    begin: integer (optional)
        Start element index (inclusive). If less than zero, the start index is
        resolved relative to the last array element. Default: 0.

    end: integer (optional)
        End element index (exclusive). If less than zero, the end index is
        resolved relative to the last array element. Default: arr.length.

    Returns
    -------
    out: Float64Array
        A new typed array view.

    Examples
    --------
    > var arr1 = new {{alias}}( [ 1.0, -1.0, 0.0, 2.0, -2.0 ] );
    > var arr2 = arr1.subarray( 2 )
    <Float64Array>[ 0.0, 2.0, -2.0 ]


{{alias}}.prototype.toLocaleString( [locales[, options]] )
    Serializes an array as a locale-specific string.

    Parameters
    ----------
    locales: string|Array<string> (optional)
        A BCP 47 language tag, or an array of such tags.

    options: Object (optional)
        Options.

    Returns
    -------
    str: string
        A typed array string representation.

    Examples
    --------
    > var arr = new {{alias}}( [ 1.0, -1.0, 0.0 ] );
    > arr.toLocaleString()
    '1,-1,0'


{{alias}}.prototype.toString()
    Serializes an array as a string.

    Returns
    -------
    str: string
        A typed array string representation.

    Examples
    --------
    > var arr = new {{alias}}( [ 1.0, -1.0, 0.0 ] );
    > arr.toString()
    '1,-1,0'


{{alias}}.prototype.values()
    Returns an iterator for iterating over array elements.

    Returns
    -------
    iter: Iterator
        Iterator for iterating over array elements.

    Examples
    --------
    > var arr = new {{alias}}( [ 1.0, -1.0 ] );
    > it = arr.values();
    > it.next().value
    1.0
    > it.next().value
    -1.0
    > it.next().done
    true


    See Also
    --------