Package Exports
- @stdlib/string-from-code-point
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Readme
fromCodePoint
Create a string from a sequence of Unicode code points.
Installation
npm install @stdlib/string-from-code-pointUsage
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.fromCharCodein the following ways:- The function provides support for all valid Unicode values (up to
21bits). 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.fromCharCodedoes not support surrogate pairs, supporting only UCS-2, a subset of UTF-16.
- The function provides support for all valid Unicode values (up to
This function differs from
String.fromCodePointin the following ways:- The function supports explicitly providing an array-like
objectcontaining 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.
- The function supports explicitly providing an array-like
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 ) );
}CLI
Installation
To use the module as a general utility, install the module globally
npm install -g @stdlib/string-from-code-pointUsage
Usage: from-code-point [options] [<code_point> <code_point> ...]
Options:
-h, --help Print this message.
-V, --version Print the package version.
--split sep Delimiter for stdin data. Default: '/\\r?\\n/'.Notes
If the split separator is a regular expression, ensure that the
splitoption is either properly escaped or enclosed in quotes.# Not escaped... $ echo -n $'97\n98\n99' | from-code-point --split /\r?\n/ # Escaped... $ echo -n $'97\n98\n99' | from-code-point --split /\\r?\\n/
The implementation ignores trailing delimiters.
Examples
$ from-code-point 9731
☃To use as a standard stream,
$ echo -n '9731' | from-code-point
☃By default, when used as a standard stream, the implementation assumes newline-delimited data. To specify an alternative delimiter, set the split option.
$ echo -n '97\t98\t99\t' | from-code-point --split '\t'
abcNotice
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
License
See LICENSE.
Copyright
Copyright © 2016-2021. The Stdlib Authors.