79 lines
3.7 KiB
Markdown
79 lines
3.7 KiB
Markdown
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---
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id: a0b5010f579e69b815e7c5d6
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title: Search and Replace
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localeTitle: Buscar y reemplazar
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isRequired: true
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challengeType: 5
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---
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## Description
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<section id='description'>
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Realice una búsqueda y reemplace la oración usando los argumentos proporcionados y devuelva la nueva oración.
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primer argumento es la oración para realizar la búsqueda y reemplazar.
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Segundo argumento es la palabra que reemplazará (antes).
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Tercer argumento es con lo que reemplazará el segundo argumento por (después).
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<strong>Nota</strong> <br> Conserve el caso del primer carácter en la palabra original cuando lo reemplace. Por ejemplo, si quiere reemplazar la palabra "Libro" con la palabra "perro", debe ser reemplazada como "Perro"
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Recuerde usar <a href='http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514' target='_blank'>Lectura-Búsqueda-Preguntar</a> si se atasca. Trate de emparejar el programa. Escribe tu propio código.
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</section>
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## Instructions
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<section id='instructions'>
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: ' <code>myReplace("Let us go to the store", "store", "mall")</code> debe devolver "Vamos <code>myReplace("Let us go to the store", "store", "mall")</code> ".'
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testString: 'assert.deepEqual(myReplace("Let us go to the store", "store", "mall"), "Let us go to the mall", "<code>myReplace("Let us go to the store", "store", "mall")</code> should return "Let us go to the mall".");'
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- text: ' <code>myReplace("He is Sleeping on the couch", "Sleeping", "sitting")</code> debe devolver "Está sentado en el sofá".
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testString: 'assert.deepEqual(myReplace("He is Sleeping on the couch", "Sleeping", "sitting"), "He is Sitting on the couch", "<code>myReplace("He is Sleeping on the couch", "Sleeping", "sitting")</code> should return "He is Sitting on the couch".");'
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- text: ' <code>myReplace("This has a spellngi error", "spellngi", "spelling")</code> debe devolver "Esto tiene un error de ortografía".'
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testString: 'assert.deepEqual(myReplace("This has a spellngi error", "spellngi", "spelling"), "This has a spelling error", "<code>myReplace("This has a spellngi error", "spellngi", "spelling")</code> should return "This has a spelling error".");'
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- text: ' <code>myReplace("His name is Tom", "Tom", "john")</code> debe devolver "Su nombre es John".
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testString: 'assert.deepEqual(myReplace("His name is Tom", "Tom", "john"), "His name is John", "<code>myReplace("His name is Tom", "Tom", "john")</code> should return "His name is John".");'
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- text: ' <code>myReplace("Let us get back to more Coding", "Coding", "algorithms")</code> debería devolver "Regresemos a más Algoritmos".
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testString: 'assert.deepEqual(myReplace("Let us get back to more Coding", "Coding", "algorithms"), "Let us get back to more Algorithms", "<code>myReplace("Let us get back to more Coding", "Coding", "algorithms")</code> should return "Let us get back to more Algorithms".");'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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function myReplace(str, before, after) {
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return str;
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}
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myReplace("A quick brown fox jumped over the lazy dog", "jumped", "leaped");
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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function myReplace(str, before, after) {
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if (before.charAt(0) === before.charAt(0).toUpperCase()) {
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after = after.charAt(0).toUpperCase() + after.substring(1);
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} else {
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after = after.charAt(0).toLowerCase() + after.substring(1);
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}
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return str.replace(before, after);
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}
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```
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</section>
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