Slice constructor.
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> Slice constructor.
``bash`
npm install @stdlib/slice-ctor
`javascript`
var Slice = require( '@stdlib/slice-ctor' );
#### Slice( \[stop] )
Returns a Slice instance.
`javascript
var s = new Slice();
// returns
s = new Slice();
// returns
`
The constructor accepts the following arguments:
- stop: ending index (exclusive). Default: null.
#### Slice( start, stop\[, step] )
Returns a Slice instance.
`javascript
var s = new Slice( 0, 10 );
// returns
s = new Slice( 0, 10, 1 );
// returns
`
The constructor accepts the following arguments:
- start: starting index (inclusive).
- stop: ending index (exclusive).
- step: index increment. A numeric index increment argument must be a non-zero integer value. Default: null.
*
#### Slice.name
String value of the Slice constructor name.
`javascript`
var str = Slice.name;
// returns 'Slice'
#### Slice.prototype.start
Read-only property returning the slice starting index.
`javascript
var s = new Slice( 10 );
// returns
var start = s.start;
// returns null
s = new Slice( 2, 10 );
// returns
start = s.start;
// returns 2
`
#### Slice.prototype.stop
Read-only property returning the slice ending index.
`javascript
var s = new Slice( null );
// returns
var stop = s.stop;
// returns null
s = new Slice( 10 );
// returns
stop = s.stop;
// returns 10
s = new Slice( 2, 10 );
// returns
stop = s.stop;
// returns 10
`
#### Slice.prototype.step
Read-only property returning the slice index increment.
`javascript
var s = new Slice( 10 );
// returns
var step = s.step;
// returns null
s = new Slice( 2, 10 );
// returns
step = s.step;
// returns null
s = new Slice( 2, 10, 1 );
// returns
step = s.step;
// returns 1
`
*
#### Slice.prototype.toString()
Serializes a Slice as a string.
`javascript
var s = new Slice( 10 );
// returns
var str = s.toString();
// returns 'Slice(null,10,null)'
s = new Slice( 2, 10, 1 );
// returns
str = s.toString();
// returns 'Slice(2,10,1)'
`
#### Slice.prototype.toJSON()
Serializes a Slice as a [JSON][json] object.
`javascript
var s = new Slice( 10 );
// returns
var o = s.toJSON();
// returns { 'type': 'Slice', 'data': [ null, 10, null ] }
s = new Slice( 2, 10, 1 );
// returns
o = s.toJSON();
// returns { 'type': 'Slice', 'data': [ 2, 10, 1 ] }
`
JSON.stringify() implicitly calls this method when stringifying a Slice instance.
*
- Slice arguments may be either integers, null, or undefined, where a non-integer value indicates a slice parameter which should be determined based on the slice context (e.g., when used to index into an [ndarray][@stdlib/ndarray/ctor]).ndarray
- Slice instances have no explicit functionality; however, they are used by [][@stdlib/ndarray] and other packages for creating views into multi-dimensional data structures.
*
`javascript
var Slice = require( '@stdlib/slice-ctor' );
var s = new Slice( 9, -10, -1 );
// returns
var start = s.start;
console.log( 'Start: %d', start );
// => 'Start: 9'
var stop = s.stop;
console.log( 'Stop: %d', stop );
// => 'Stop: -10'
var step = s.step;
console.log( 'Step: %d', step );
// => 'Step: -1'
var str = s.toString();
console.log( str );
// => 'Slice(9,-10,-1)'
var o = s.toJSON();
console.log( JSON.stringify( o ) );
// => '{"type":"Slice","data":[9,-10,-1]}'
`
*
- [@stdlib/ndarray-ctor][@stdlib/ndarray/ctor]: multidimensional array constructor.
- [@stdlib/slice-multi][@stdlib/slice/multi]: multi-slice constructor.
*
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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[deno-url]: https://github.com/stdlib-js/slice-ctor/tree/deno
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[@stdlib/slice/multi]: https://www.npmjs.com/package/@stdlib/slice-multi