Press n or j to go to the next uncovered block, b, p or k for the previous block.
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* @license Apache-2.0
*
* Copyright (c) 2023 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 nextGraphemeClusterBreak = require( '@stdlib/string/next-grapheme-cluster-break' );
// MAIN //
/**
* Invokes a function for each grapheme cluster (i.e., user-perceived character) in a string.
*
* @param {string} str - input string
* @param {Function} clbk - function to invoke
* @param {*} [thisArg] - execution context
* @returns {string} input string
*
* @example
* function log( value, index ) {
* console.log( '%d: %s', index, value );
* }
*
* forEach( 'Hello', log );
*/
function forEach( str, clbk, thisArg ) {
var len;
var idx;
var brk;
len = str.length;
idx = 0;
while ( idx < len ) {
brk = nextGraphemeClusterBreak( str, idx );
if ( brk === -1 ) {
brk = len;
}
clbk.call( thisArg, str.substring( idx, brk ), idx, str );
idx = brk;
}
return str;
}
// EXPORTS //
module.exports = forEach;
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