89 lines
3.7 KiB
Markdown
89 lines
3.7 KiB
Markdown
---
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id: 56533eb9ac21ba0edf2244e0
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title: Replacing If Else Chains with Switch
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challengeType: 1
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videoUrl: ''
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localeTitle: Reemplazo de cadenas de otro tipo con interruptor
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---
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## Description
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<section id="description"> Si tiene muchas opciones para elegir, una instrucción <code>switch</code> puede ser más fácil de escribir que muchas instrucciones encadenadas <code>if</code> / <code>else if</code> . El seguimiento: <blockquote> si (val === 1) { <br> respuesta = "a"; <br> } else if (val === 2) { <br> respuesta = "b"; <br> } else { <br> respuesta = "c"; <br> } </blockquote> puede ser reemplazado con: <blockquote> interruptor (val) { <br> caso 1: <br> respuesta = "a"; <br> descanso; <br> caso 2: <br> respuesta = "b"; <br> descanso; <br> defecto: <br> respuesta = "c"; <br> } </blockquote></section>
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## Instructions
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<section id="instructions"> Cambie las instrucciones encadenadas <code>if</code> / <code>else if</code> en una instrucción <code>switch</code> . </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: No debe utilizar ninguna <code>else</code> declaración en ningún lugar del editor.
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testString: 'assert(!/else/g.test(code), "You should not use any <code>else</code> statements anywhere in the editor");'
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- text: No debe utilizar ninguna sentencia <code>if</code> en ningún lugar del editor.
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testString: 'assert(!/if/g.test(code), "You should not use any <code>if</code> statements anywhere in the editor");'
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- text: Debe tener al menos cuatro declaraciones de <code>break</code>
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testString: 'assert(code.match(/break/g).length >= 4, "You should have at least four <code>break</code> statements");'
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- text: <code>chainToSwitch("bob")</code> debe ser "Marley"
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testString: 'assert(chainToSwitch("bob") === "Marley", "<code>chainToSwitch("bob")</code> should be "Marley"");'
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- text: <code>chainToSwitch(42)</code> debe ser "La Respuesta"
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testString: 'assert(chainToSwitch(42) === "The Answer", "<code>chainToSwitch(42)</code> should be "The Answer"");'
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- text: '<code>chainToSwitch(1)</code> debe ser "No hay # 1"'
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testString: 'assert(chainToSwitch(1) === "There is no #1", "<code>chainToSwitch(1)</code> should be "There is no #1"");'
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- text: <code>chainToSwitch(99)</code> debería ser "¡Me <code>chainToSwitch(99)</code> por esto!"
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testString: 'assert(chainToSwitch(99) === "Missed me by this much!", "<code>chainToSwitch(99)</code> should be "Missed me by this much!"");'
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- text: <code>chainToSwitch(7)</code> debe ser "Ate Nine"
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testString: 'assert(chainToSwitch(7) === "Ate Nine", "<code>chainToSwitch(7)</code> should be "Ate Nine"");'
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- text: <code>chainToSwitch("John")</code> debe ser "" (cadena vacía)
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testString: 'assert(chainToSwitch("John") === "", "<code>chainToSwitch("John")</code> should be "" (empty string)");'
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- text: <code>chainToSwitch(156)</code> debe ser "" (cadena vacía)
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testString: 'assert(chainToSwitch(156) === "", "<code>chainToSwitch(156)</code> should be "" (empty string)");'
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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 chainToSwitch(val) {
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var answer = "";
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// Only change code below this line
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if (val === "bob") {
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answer = "Marley";
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} else if (val === 42) {
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answer = "The Answer";
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} else if (val === 1) {
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answer = "There is no #1";
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} else if (val === 99) {
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answer = "Missed me by this much!";
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} else if (val === 7) {
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answer = "Ate Nine";
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}
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// Only change code above this line
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return answer;
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}
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// Change this value to test
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chainToSwitch(7);
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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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// solution required
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```
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</section>
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