npm package: @stdlib/ndarray-base-assert-is-row-major-contiguous
Description: Determine if an array is row-major contiguous.
Author: The Stdlib Authors
Latest version: 0.2.2

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# isRowMajorContiguous

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> Determine if an array is row-major contiguous.

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<section class="intro">

An array is **contiguous** if the memory address of each array element is adjacent to the memory address of the next array element.

</section>

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<section class="installation">

## Installation

```bash
npm install @stdlib/ndarray-base-assert-is-row-major-contiguous
```

</section>

<section class="usage">

## Usage

```javascript
var isRowMajorContiguous = require( '@stdlib/ndarray-base-assert-is-row-major-contiguous' );
```

#### isRowMajorContiguous( shape, strides, offset )

Returns a `boolean` indicating if an array is row-major contiguous.

```javascript
var shape = [ 2, 2 ];
var strides = [ 2, 1 ];
var offset = 25;

var bool = isRowMajorContiguous( shape, strides, offset );
// returns true

shape = [ 10 ];
strides = [ 3 ]; // every third memory element
offset = 0;

bool = isRowMajorContiguous( shape, strides, offset );
// returns false
```

</section>

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</section>

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<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var discreteUniform = require( '@stdlib/random-base-discrete-uniform' );
var shape2strides = require( '@stdlib/ndarray-base-shape2strides' );
var strides2offset = require( '@stdlib/ndarray-base-strides2offset' );
var randu = require( '@stdlib/random-base-randu' );
var isRowMajorContiguous = require( '@stdlib/ndarray-base-assert-is-row-major-contiguous' );

var strides;
var offset;
var shape;
var bool;
var i;
var j;

shape = [ 0, 0, 0 ];

for ( i = 0; i < 100; i++ ) {
    // Generate a random array shape:
    shape[ 0 ] = discreteUniform( 1, 10 );
    shape[ 1 ] = discreteUniform( 1, 10 );
    shape[ 2 ] = discreteUniform( 1, 10 );

    // Generate strides:
    if ( randu() < 0.5 ) {
        strides = shape2strides( shape, 'row-major' );
    } else {
        strides = shape2strides( shape, 'column-major' );
    }
    j = discreteUniform( 0, shape.length-1 );
    strides[ j ] *= ( randu() < 0.5 ) ? -1 : 1;

    strides[ 0 ] *= discreteUniform( 1, 2 ); // if scaled by 1, then single segment

    // Compute the index offset:
    offset = strides2offset( shape, strides ) + 25; // include a view offset

    // Determine if the array is row-major contiguous:
    bool = isRowMajorContiguous( shape, strides, offset );
    console.log( 'Shape: %s. Strides: %s. Offset: %d. Contiguous: %s.', shape.join( 'x' ), strides.join( ',' ), offset, bool );
}
```

</section>

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## License

See [LICENSE][stdlib-license].


## Copyright

Copyright &copy; 2016-2026. The Stdlib [Authors][stdlib-authors].

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