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@stdlib/string-from-code-point

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@stdlib/string-from-code-point

Create a string from a sequence of Unicode code points.

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About stdlib...

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fromCodePoint

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Create a string from a sequence of Unicode code points.

Installation

npm install @stdlib/string-from-code-point

Usage

var fromCodePoint = require( '@stdlib/string-from-code-point' );

fromCodePoint( pt1[, pt2[, pt3[, ...]]] )

Creates a string from a sequence of Unicode code points.

var out = fromCodePoint( 9731 );
// returns '☃'

In addition to providing code points as separate arguments, the function supports providing an array-like object as a single argument containing a sequence of code points.

var Uint16Array = require( '@stdlib/array-uint16' );

var out = fromCodePoint( 97, 98, 99 );
// returns 'abc'

out = fromCodePoint( new Uint16Array( [ 97, 98, 99 ] ) );
// returns 'abc'

Notes

  • This function differs from String.fromCharCode in the following ways:

    • The function provides support for all valid Unicode values (up to 21 bits). While most common Unicode values can be represented using one 16-bit unit, higher code point characters require two 16-bit units (a surrogate pair consisting of a high and a low surrogate) to form a single character. String.fromCharCode does not support surrogate pairs, supporting only UCS-2, a subset of UTF-16.
  • This function differs from String.fromCodePoint in the following ways:

    • The function supports explicitly providing an array-like object containing a sequence of code points.
    • The function requires at least one code point.
    • The function requires that all code points be nonnegative integers. The function does not support values, such as null, undefined, true, false, '0', '1', etc., which can be cast to integer values.

Examples

var randu = require( '@stdlib/random-base-randu' );
var floor = require( '@stdlib/math-base-special-floor' );
var UNICODE_MAX_BMP = require( '@stdlib/constants-unicode-max-bmp' );
var fromCodePoint = require( '@stdlib/string-from-code-point' );

var x;
var i;

for ( i = 0; i < 100; i++ ) {
    x = floor( randu()*UNICODE_MAX_BMP );
    console.log( '%d => %s', x, fromCodePoint( x ) );
}

See Also

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.

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License

See LICENSE.

Copyright © 2016-2024. The Stdlib Authors.

Keywords

stdlib

FAQs

Package last updated on 28 Jul 2024

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