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gconjoin

Return a string created by joining strided array elements into a human-readable list using a conjunction.

Installation

npm install @stdlib/blas-ext-base-gconjoin

Alternatively,

• To load the package in a website via a script tag without installation and bundlers, use the ES Module available on the esm branch (see README).
• If you are using Deno, visit the deno branch (see README for usage intructions).
• For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the umd branch (see README).

The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.

To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.

Usage

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

gconjoin( N, prefix, suffix, conjunction, oxfordComma, x, strideX )

Returns a string created by joining strided array elements into a human-readable list using a conjunction.

var x = [ 1, 2, 3, 4 ];

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

The function has the following parameters:

• N: number of indexed elements.
• prefix: string to prepend.
• suffix: string to append.
• conjunction: conjunction before the last element.
• oxfordComma: boolean specifying whether to include an Oxford comma.
• 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, 2, 3, 4, 5, 6 ];

var str = gconjoin( 3, '', '', 'and', true, x, 2 );
// returns '1, 3, and 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 = gconjoin( 3, '', '', 'and', true, x1, 2 );
// returns '2, 4, and 6'

gconjoin.ndarray( N, prefix, suffix, conjunction, oxfordComma, x, strideX, offsetX )

Returns a string created by joining strided array elements into a human-readable list using a conjunction and alternative indexing semantics.

var x = [ 1, 2, 3, 4 ];

var str = gconjoin.ndarray( x.length, '', '', 'and', true, x, 1, 0 );
// returns '1, 2, 3, and 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, 2, 3, 4, 5, 6 ];

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

Notes

• If N <= 0, both functions return the prefix followed by the suffix.
• If N < 2, the conjunction parameter is ignored.
• If N < 3, the oxfordComma parameter has no effect.
• 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).

Examples

var discreteUniform = require( '@stdlib/random-array-discrete-uniform' );
var gconjoin = require( '@stdlib/blas-ext-base-gconjoin' );

var x = discreteUniform( 5, -100, 100, {
    'dtype': 'generic'
});
console.log( x );

var out = gconjoin( x.length, '', '', 'and', true, x, 1 );
console.log( out );

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Notice

This package is part of 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, see the main project repository.

Community

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License

See LICENSE.

Copyright

Copyright © 2016-2026. The Stdlib Authors.