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scalar2array

Create a single-element array containing a provided scalar value.

Installation

npm install @stdlib/array-from-scalar

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 scalar2array = require( '@stdlib/array-from-scalar' );

scalar2array( value[, dtype] )

Returns a single-element array containing a provided scalar value.

var x = scalar2array( 3.0 );
// returns <Float64Array>[ 3.0 ]

If not provided a dtype argument and value

• is a number, the default data type is the default real-valued floating-point data type.
• is a boolean, the default data type is the default boolean data type.
• is a complex number object of a known data type, the data type is the same as the provided value.
• is a complex number object of an unknown data type, the default data type is the default complex-valued floating-point data type.
• is any other value type, the default data type is 'generic'.

To explicitly specify the data type of the returned array, provide a dtype argument.

var x = scalar2array( 3.0, 'float32' );
// returns <Float32Array>[ 3.0 ]

Notes

• If value is a number and the dtype argument is a complex data type, the function returns a complex number array containing a complex number whose real component equals the provided scalar value and whose imaginary component is zero.
• The function does not guard against precision loss when value is a number and the dtype argument is an integer data type.

Examples

var Complex128 = require( '@stdlib/complex-float64-ctor' );
var array2scalar = require( '@stdlib/array-from-scalar' );

var x = array2scalar( 3.0 );
// returns <Float64Array>[ 3.0 ]

x = array2scalar( 3, 'int32' );
// returns <Int32Array>[ 3 ]

x = array2scalar( new Complex128( 3.0, 4.0 ) );
// returns <Complex128Array>

x = array2scalar( {} );
// returns [ {} ]

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See Also

• @stdlib/array-from-iterator: create (or fill) an array from an iterator.

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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 © 2016-2024. The Stdlib Authors.