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Apply a nullary callback and assign results to elements in a strided output array.
import nullary from 'https://cdn.jsdelivr.net/gh/stdlib-js/strided-base-nullary@deno/mod.js';You can also import the following named exports from the package:
import { ndarray } from 'https://cdn.jsdelivr.net/gh/stdlib-js/strided-base-nullary@deno/mod.js';Applies a nullary callback and assigns results to elements in a strided output array.
import Float64Array from 'https://cdn.jsdelivr.net/gh/stdlib-js/array-float64@deno/mod.js';
function fill() {
return 3.0;
}
var x = new Float64Array( [ -2.0, 1.0, 3.0, -5.0, 4.0, 0.0, -1.0, -3.0 ] );
nullary( [ x ], [ x.length ], [ 1 ], fill );
// x => <Float64Array>[ 3.0, 3.0, 3.0, 3.0, 3.0, 3.0, 3.0, 3.0 ]The function accepts the following arguments:
- arrays: array-like object containing one strided output array.
- shape: array-like object containing a single element, the number of indexed elements.
- strides: array-like object containing the stride length for the strided output array.
- fcn: nullary function to apply.
The shape and strides parameters determine which elements in the strided output array are accessed at runtime. For example, to index the first N elements of the strided output array in reverse order,
import Float64Array from 'https://cdn.jsdelivr.net/gh/stdlib-js/array-float64@deno/mod.js';
function fill() {
return 3.0;
}
var x = new Float64Array( [ -1.0, -2.0, -3.0, -4.0, -5.0, -6.0 ] );
nullary( [ x ], [ 3 ], [ -1 ], fill );
// x => <Float64Array>[ 3.0, 3.0, 3.0, -4.0, -5.0, -6.0 ]Note that indexing is relative to the first index. To introduce an offset, use typed array views.
import Float64Array from 'https://cdn.jsdelivr.net/gh/stdlib-js/array-float64@deno/mod.js';
function fill() {
return 3.0;
}
// Initial arrays...
var x0 = new Float64Array( [ -1.0, -2.0, -3.0, -4.0, -5.0, -6.0 ] );
// Create offset views...
var x1 = new Float64Array( x0.buffer, x0.BYTES_PER_ELEMENT*1 ); // start at 2nd element
nullary( [ x1 ], [ 3 ], [ 1 ], fill );
// x0 => <Float64Array>[ -1.0, 3.0, 3.0, 3.0, -5.0, -6.0 ]Applies a nullary callback and assigns results to elements in a strided output array using alternative indexing semantics.
import Float64Array from 'https://cdn.jsdelivr.net/gh/stdlib-js/array-float64@deno/mod.js';
function fill() {
return 3.0;
}
var x = new Float64Array( [ -1.0, -2.0, -3.0, -4.0, -5.0 ] );
nullary.ndarray( [ x ], [ x.length ], [ 1 ], [ 0 ], fill );
// x => <Float64Array>[ 3.0, 3.0, 3.0, 3.0, 3.0 ]The function accepts the following additional arguments:
- offsets: array-like object containing the starting index (i.e., index offset) for the strided output array.
While typed array views mandate a view offset based on the underlying buffer, the offsets parameter supports indexing semantics based on starting indices. For example, to index the last N elements in the strided output array,
import Float64Array from 'https://cdn.jsdelivr.net/gh/stdlib-js/array-float64@deno/mod.js';
function fill() {
return 3.0;
}
var x = new Float64Array( [ -1.0, -2.0, -3.0, -4.0, -5.0, -6.0 ] );
nullary.ndarray( [ x ], [ 3 ], [ -1 ], [ x.length-1 ], fill );
// x => <Float64Array>[ -1.0, -2.0, -3.0, 3.0, 3.0, 3.0 ]var discreteUniform = require( 'https://cdn.jsdelivr.net/gh/stdlib-js/random-base-discrete-uniform' ).factory;
import filledarray from 'https://cdn.jsdelivr.net/gh/stdlib-js/array-filled@deno/mod.js';
import nullary from 'https://cdn.jsdelivr.net/gh/stdlib-js/strided-base-nullary@deno/mod.js';
var x = filledarray( 0.0, 10, 'generic' );
console.log( x );
var shape = [ x.length ];
var strides = [ 1 ];
var offsets = [ 0 ];
nullary.ndarray( [ x ], shape, strides, offsets, discreteUniform( -100, 100 ) );
console.log( x );@stdlib/strided-base/binary: apply a binary callback to elements in strided input arrays and assign results to elements in a strided output array.@stdlib/strided-base/quaternary: apply a quaternary callback to strided input array elements and assign results to elements in a strided output array.@stdlib/strided-base/quinary: apply a quinary callback to strided input array elements and assign results to elements in a strided output array.@stdlib/strided-base/ternary: apply a ternary callback to strided input array elements and assign results to elements in a strided output array.@stdlib/strided-base/unary: apply a unary callback to elements in a strided input array and assign results to elements in a strided output array.
This package is part of stdlib, a standard library with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.
See LICENSE.
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