var gjoin = require( '@stdlib/blas/ext/base/gjoin' );

Returns a string created by joining strided array elements using a specified separator.

var x = [ 1.0, 2.0, 3.0, 4.0 ];

var str = gjoin( x.length, ',', x, 1 );
// returns '1,2,3,4'

The function has the following parameters:

• N: number of indexed elements.
• separator: separator.
• x: input array.
• strideX: stride length.

The N and stride parameters determine which elements in the strided array are accessed at runtime. For example, to join every other element:

var x = [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ];

var str = gjoin( 3, '-', x, 2 );
// returns '1-3-5'

Note that indexing is relative to the first index. To introduce an offset, use typed array views.

var Float64Array = require( '@stdlib/array/float64' );

// Initial array:
var x0 = new Float64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ] );

// Create an offset view:
var x1 = new Float64Array( x0.buffer, x0.BYTES_PER_ELEMENT*1 ); // start at 2nd element

// Join elements:
var str = gjoin( 3, '|', x1, 2 );
// returns '2|4|6'

Returns a string created by joining strided array elements using a specified separator and alternative indexing semantics.

var x = [ 1.0, 2.0, 3.0, 4.0 ];

var str = gjoin.ndarray( x.length, ',', x, 1, 0 );
// returns '1,2,3,4'

The function has the following additional parameters:

• offsetX: starting index.

While typed array views mandate a view offset based on the underlying buffer, the offset parameter supports indexing semantics based on a starting index. For example, to access only the last three elements of the strided array:

var x = [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ];

var str = gjoin.ndarray( 3, '|', x, 1, x.length-3 );
// returns '4|5|6'

• If N <= 0, both functions return an empty string.
• If an array element is either null or undefined, both functions will serialize the element as an empty string.
• Both functions support array-like objects having getter and setter accessors for array element access (e.g., @stdlib/array/base/accessor).