Return the index offset specifying the underlying buffer index of the first iterated ndarray element.
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> Return the index offset specifying the underlying buffer index of the first iterated [ndarray][@stdlib/ndarray/base/ctor] element.
``bash`
npm install @stdlib/ndarray-base-offset
`javascript`
var offset = require( '@stdlib/ndarray-base-offset' );
#### offset( x )
Returns the index offset specifying the underlying buffer index of the first iterated [ndarray][@stdlib/ndarray/base/ctor] element.
`javascript
var zeros = require( '@stdlib/ndarray-zeros' );
var x = zeros( [ 3, 2, 3 ] );
// returns
var n = offset( x );
// returns 0
`
`javascript
var zeros = require( '@stdlib/ndarray-zeros' );
var slice = require( '@stdlib/ndarray-slice' );
var E = require( '@stdlib/slice-multi' );
var S = require( '@stdlib/slice-ctor' );
var offset = require( '@stdlib/ndarray-base-offset' );
// Create an array:
var x = zeros( [ 10, 10, 10, 10 ] );
// returns
// Define some slices:
var slices = [
// :,:,:,:
E( null, null, null, null ),
// 5:10,4,2:4,::-1
E( S( 5, 10 ), 4, S( 2, 4 ), S( null, null, -1 ) ),
// :,:,2,:
E( null, null, 2, null ),
// 1,2,3,:
E( 1, 2, 3, null ),
// 1,3,::2,4::2
E( 1, 3, S( null, null, 2 ), S( 4, null, 2 ) )
];
// Determine the index offset for each slice...
var s;
var i;
for ( i = 0; i < slices.length; i++ ) {
s = slice( x, slices[ i ] );
console.log( '%s => %d', s.shape.join( 'x' ), offset( s ) );
}
`
*
This package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, 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][stdlib], see the main project [repository][stdlib].
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---
See [LICENSE][stdlib-license].
Copyright © 2016-2026. The Stdlib [Authors][stdlib-authors].
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