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slice

Return a shallow copy of a portion of an array.

Usage

import slice from 'https://cdn.jsdelivr.net/gh/stdlib-js/array-slice@esm/index.mjs';

slice( x[, start[, end]] )

Returns a shallow copy of a portion of an array.

var x = [ 1, 2, 3, 4, 5, 6 ];

var out = slice( x );
// returns [ 1, 2, 3, 4, 5, 6 ]

var bool = ( out === x );
// returns false

The function accepts the following arguments:

x: input array.
start: starting index (inclusive). Default: 0.
end: ending index (exclusive). Default: x.length.

By default, the function returns a shallow copy beginning from the first element of the provided input array. To begin copying from an alternative element, provide a starting index (inclusive).

var x = [ 1, 2, 3, 4, 5, 6 ];

var out = slice( x, 2 );
// returns [ 3, 4, 5, 6 ]

By default, the function copies through the end of the provided input array. To copy up until a specific element, provide an ending index (exclusive).

var x = [ 1, 2, 3, 4, 5, 6 ];

var out = slice( x, 1, 4 );
// returns [ 2, 3, 4 ]

Notes

If provided an array-like object having a slice method, the function defers execution to that method and assumes that the method API has the following signature:
```
x.slice( start, end )
```
If provided an array-like object without a slice method, the function copies input array elements to a new generic array.

Examples

<!DOCTYPE html>
<html lang="en">
<body>
<script type="module">

import Float64Array from 'https://cdn.jsdelivr.net/gh/stdlib-js/array-float64@esm/index.mjs';
import zeroTo from 'https://cdn.jsdelivr.net/gh/stdlib-js/array-zero-to@esm/index.mjs';
import slice from 'https://cdn.jsdelivr.net/gh/stdlib-js/array-slice@esm/index.mjs';

var x = zeroTo( 6, 'float64' );
// returns <Float64Array>[ 0.0, 1.0, 2.0, 3.0, 4.0, 5.0 ]

var s = slice( x );
// returns <Float64Array>[ 0.0, 1.0, 2.0, 3.0, 4.0, 5.0 ]

s = slice( x, 0, 4 );
// returns <Float64Array>[ 0.0, 1.0, 2.0, 3.0 ]

s = slice( x, 2 );
// returns <Float64Array>[ 2.0, 3.0, 4.0, 5.0 ]

s = slice( x, 2, 4 );
// returns <Float64Array>[ 2.0, 3.0 ]

</script>
</body>
</html>

Notice

This package is part of stdlib, a standard library 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

License

See LICENSE.

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