Determine if an array is row-major contiguous.
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> Determine if an array is row-major contiguous.
An array is contiguous if the memory address of each array element is adjacent to the memory address of the next array element.
``bash`
npm install @stdlib/ndarray-base-assert-is-row-major-contiguous
`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
`
`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 );
}
`
*
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