86 lines
2.6 KiB
JavaScript
86 lines
2.6 KiB
JavaScript
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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2018 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// MODULES //
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var rescape = require( '@stdlib/utils/escape-regexp-string' );
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var isFunction = require( '@stdlib/assert/is-function' );
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var isString = require( '@stdlib/assert/is-string' ).isPrimitive;
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var isRegExp = require( '@stdlib/assert/is-regexp' );
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var format = require( './../../format' );
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// MAIN //
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/**
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* Replace search occurrences with a replacement string.
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*
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* @param {string} str - input string
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* @param {(string|RegExp)} search - search expression
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* @param {(string|Function)} newval - replacement value or function
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* @throws {TypeError} first argument must be a string
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* @throws {TypeError} second argument argument must be a string or regular expression
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* @throws {TypeError} third argument must be a string or function
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* @returns {string} new string containing replacement(s)
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*
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* @example
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* var str = 'beep';
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* var out = replace( str, 'e', 'o' );
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* // returns 'boop'
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*
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* @example
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* var str = 'Hello World';
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* var out = replace( str, /world/i, 'Mr. President' );
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* // returns 'Hello Mr. President'
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*
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* @example
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* var capitalize = require( '@stdlib/string/capitalize' );
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*
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* var str = 'Oranges and lemons say the bells of St. Clement\'s';
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*
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* function replacer( match, p1 ) {
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* return capitalize( p1 );
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* }
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*
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* var out = replace( str, /([^\s]*)/gi, replacer);
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* // returns 'Oranges And Lemons Say The Bells Of St. Clement\'s'
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*/
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function replace( str, search, newval ) {
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if ( !isString( str ) ) {
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throw new TypeError( format( 'invalid argument. First argument must be a string. Value: `%s`.', str ) );
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}
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if ( isString( search ) ) {
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search = rescape( search );
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search = new RegExp( search, 'g' );
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}
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else if ( !isRegExp( search ) ) {
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throw new TypeError( format( 'invalid argument. Second argument must be a string or regular expression. Value: `%s`.', search ) );
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}
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if ( !isString( newval ) && !isFunction( newval ) ) {
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throw new TypeError( format( 'invalid argument. Third argument must be a string or replacement function. Value: `%s`.', newval ) );
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}
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return str.replace( search, newval );
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}
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// EXPORTS //
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module.exports = replace;
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