72 lines
1.8 KiB
JavaScript
72 lines
1.8 KiB
JavaScript
|
/**
|
||
|
|
* @license Apache-2.0
|
||
|
|
*
|
||
|
|
* Copyright (c) 2021 The Stdlib Authors.
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
'use strict';
|
||
|
|
|
||
|
|
// MODULES //
|
||
|
|
|
||
|
|
var isString = require( '@stdlib/assert/is-string' ).isPrimitive;
|
||
|
|
var nextGraphemeClusterBreak = require( './../../next-grapheme-cluster-break' );
|
||
|
|
var format = require( './../../format' );
|
||
|
|
|
||
|
|
|
||
|
|
// MAIN //
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Splits a string by its grapheme cluster breaks.
|
||
|
|
*
|
||
|
|
* @param {string} str - input string
|
||
|
|
* @throws {TypeError} must provide a string primitive
|
||
|
|
* @returns {StringArray} array of grapheme clusters
|
||
|
|
*
|
||
|
|
* @example
|
||
|
|
* var out = splitGraphemeClusters( 'café' );
|
||
|
|
* // returns [ 'c', 'a', 'f', 'é' ]
|
||
|
|
*
|
||
|
|
* @example
|
||
|
|
* var out = splitGraphemeClusters( '🍕🍕🍕' );
|
||
|
|
* // returns [ '🍕', '🍕', '🍕' ]
|
||
|
|
*/
|
||
|
|
function splitGraphemeClusters( str ) {
|
||
|
|
var idx;
|
||
|
|
var brk;
|
||
|
|
var out;
|
||
|
|
|
||
|
|
if ( !isString( str ) ) {
|
||
|
|
throw new TypeError( format( 'invalid argument. Must provide a string. Value: `%s`.', str ) );
|
||
|
|
}
|
||
|
|
idx = 0;
|
||
|
|
out = [];
|
||
|
|
if ( str.length === 0 ) {
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
brk = nextGraphemeClusterBreak( str, idx );
|
||
|
|
while ( brk !== -1 ) {
|
||
|
|
out.push( str.substring( idx, brk ) );
|
||
|
|
idx = brk;
|
||
|
|
brk = nextGraphemeClusterBreak( str, idx );
|
||
|
|
}
|
||
|
|
out.push( str.substring( idx ) );
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// EXPORTS //
|
||
|
|
|
||
|
|
module.exports = splitGraphemeClusters;
|