chore(i8n,learn): processed translations

curriculum/challenges/espanol/10-coding-interview-prep/rosetta-code/vector-dot-product.md

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+---
+id: 594810f028c0303b75339ad3
+title: Vector dot product
+challengeType: 5
+forumTopicId: 302343
+dashedName: vector-dot-product
+---
+
+# --description--
+
+A vector can have one or more values represented by an ordered collection. Examples could be (x), (x, y), or (x, y, z).
+
+# --instructions--
+
+Write a function that takes two vectors (represented as one-dimensional arrays) as input and computes their dot product. Your function should return `null` on invalid inputs such as vectors of different lengths or passing anything other than two vectors.
+
+# --hints--
+
+`dotProduct` should be a function.
+
+```js
+assert.equal(typeof dotProduct, 'function');
+```
+
+`dotProduct()` should return `null`.
+
+```js
+assert.equal(dotProduct(), null);
+```
+
+`dotProduct([1], [1])` should return `1`.
+
+```js
+assert.equal(dotProduct([1], [1]), 1);
+```
+
+`dotProduct([1], [1, 2])` should return `null`.
+
+```js
+assert.equal(dotProduct([1], [1, 2]), null);
+```
+
+`dotProduct([1, 3, -5], [4, -2, -1])` should return `3`.
+
+```js
+assert.equal(dotProduct([1, 3, -5], [4, -2, -1]), 3);
+```
+
+`dotProduct([3, 2, 1], [2, 4, 2], [5, 3, 1])` should return `null`.
+
+```js
+assert.equal(dotProduct([3, 2, 1], [2, 4, 2], [5, 3, 1]), null);
+```
+
+`dotProduct([ 0, 3, 6, 9, 12 ], [ 0, 4, 8, 12, 16 ])` should return `360`.
+
+```js
+assert.equal(dotProduct([ 0, 3, 6, 9, 12 ], [ 0, 4, 8, 12, 16 ]), 360);
+```
+
+# --seed--
+
+## --seed-contents--
+
+```js
+function dotProduct(...vectors) {
+
+}
+```
+
+# --solutions--
+
+```js
+function dotProduct(...vectors) {
+  if (!vectors || !vectors.length || vectors.length > 2 || vectors[0].length !== vectors[1].length) {
+    return null;
+  }
+  const vectorLen = vectors[0].length;
+
+  let prod = 0;
+  let sum = 0;
+  let j = vectorLen;
+  let i = 2;
+  // Sum terms
+  while (j--) {
+    i = 2;
+    prod = 1;
+
+    while (i--) {
+      prod *= vectors[i][j];
+    }
+    sum += prod;
+  }
+  return sum;
+}
+```