73 lines
3.0 KiB
Markdown
73 lines
3.0 KiB
Markdown
---
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id: a7bf700cd123b9a54eef01d5
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title: No Repeats Please
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challengeType: 5
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videoUrl: ''
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localeTitle: No se repite por favor
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---
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## Description
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<section id="description"> Devuelve el número de permutaciones totales de la cadena proporcionada que no tienen letras consecutivas repetidas. Supongamos que todos los caracteres de la cadena proporcionada son únicos. Por ejemplo, <code>aab</code> debe devolver 2 porque tiene 6 permutaciones totales ( <code>aab</code> , <code>aab</code> , <code>aba</code> , <code>aba</code> , <code>baa</code> , <code>baa</code> ), pero solo 2 de ellas ( <code>aba</code> y <code>aba</code> ) no tienen la misma letra (en este caso <code>a</code> ) repitiendo Recuerda usar <a href="http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514" target="_blank">Read-Search-Ask</a> si te atascas. Trate de hacer programación en pareja. Escribe tu propio código. </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>permAlone("aab")</code> debe devolver un número.
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testString: 'assert.isNumber(permAlone("aab"), "<code>permAlone("aab")</code> should return a number.");'
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- text: <code>permAlone("aab")</code> debe devolver 2.
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testString: 'assert.strictEqual(permAlone("aab"), 2, "<code>permAlone("aab")</code> should return 2.");'
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- text: <code>permAlone("aaa")</code> debe devolver 0.
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testString: 'assert.strictEqual(permAlone("aaa"), 0, "<code>permAlone("aaa")</code> should return 0.");'
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- text: <code>permAlone("aabb")</code> debe devolver 8.
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testString: 'assert.strictEqual(permAlone("aabb"), 8, "<code>permAlone("aabb")</code> should return 8.");'
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- text: <code>permAlone("abcdefa")</code> debe devolver 3600.
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testString: 'assert.strictEqual(permAlone("abcdefa"), 3600, "<code>permAlone("abcdefa")</code> should return 3600.");'
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- text: <code>permAlone("abfdefa")</code> debe devolver 2640.
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testString: 'assert.strictEqual(permAlone("abfdefa"), 2640, "<code>permAlone("abfdefa")</code> should return 2640.");'
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- text: <code>permAlone("zzzzzzzz")</code> debe devolver 0.
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testString: 'assert.strictEqual(permAlone("zzzzzzzz"), 0, "<code>permAlone("zzzzzzzz")</code> should return 0.");'
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- text: <code>permAlone("a")</code> debe devolver 1.
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testString: 'assert.strictEqual(permAlone("a"), 1, "<code>permAlone("a")</code> should return 1.");'
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- text: <code>permAlone("aaab")</code> debe devolver 0.
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testString: 'assert.strictEqual(permAlone("aaab"), 0, "<code>permAlone("aaab")</code> should return 0.");'
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- text: <code>permAlone("aaabb")</code> debe devolver 12.
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testString: 'assert.strictEqual(permAlone("aaabb"), 12, "<code>permAlone("aaabb")</code> should return 12.");'
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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 permAlone(str) {
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return str;
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}
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permAlone('aab');
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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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