chore(i8n,learn): processed translations

curriculum/challenges/espanol/10-coding-interview-prep/algorithms/find-the-symmetric-difference.md

@@ -0,0 +1,150 @@
+---
+id: a3f503de51cf954ede28891d
+title: Find the Symmetric Difference
+challengeType: 5
+forumTopicId: 301611
+dashedName: find-the-symmetric-difference
+---
+
+# --description--
+
+The mathematical term <dfn>symmetric difference</dfn> (`△` or `⊕`) of two sets is the set of elements which are in either of the two sets but not in both. For example, for sets `A = {1, 2, 3}` and `B = {2, 3, 4}`, `A △ B = {1, 4}`.
+
+Symmetric difference is a binary operation, which means it operates on only two elements. So to evaluate an expression involving symmetric differences among *three* elements (`A △ B △ C`), you must complete one operation at a time. Thus, for sets `A` and `B` above, and `C = {2, 3}`, `A △ B △ C = (A △ B) △ C = {1, 4} △ {2, 3} = {1, 2, 3, 4}`.
+
+# --instructions--
+
+Create a function that takes two or more arrays and returns an array of their symmetric difference. The returned array must contain only unique values (*no duplicates*).
+
+# --hints--
+
+`sym([1, 2, 3], [5, 2, 1, 4])` should return `[3, 4, 5]`.
+
+```js
+assert.sameMembers(sym([1, 2, 3], [5, 2, 1, 4]), [3, 4, 5]);
+```
+
+`sym([1, 2, 3], [5, 2, 1, 4])` should contain only three elements.
+
+```js
+assert.equal(sym([1, 2, 3], [5, 2, 1, 4]).length, 3);
+```
+
+`sym([1, 2, 3, 3], [5, 2, 1, 4])` should return `[3, 4, 5]`.
+
+```js
+assert.sameMembers(sym([1, 2, 3, 3], [5, 2, 1, 4]), [3, 4, 5]);
+```
+
+`sym([1, 2, 3, 3], [5, 2, 1, 4])` should contain only three elements.
+
+```js
+assert.equal(sym([1, 2, 3, 3], [5, 2, 1, 4]).length, 3);
+```
+
+`sym([1, 2, 3], [5, 2, 1, 4, 5])` should return `[3, 4, 5]`.
+
+```js
+assert.sameMembers(sym([1, 2, 3], [5, 2, 1, 4, 5]), [3, 4, 5]);
+```
+
+`sym([1, 2, 3], [5, 2, 1, 4, 5])` should contain only three elements.
+
+```js
+assert.equal(sym([1, 2, 3], [5, 2, 1, 4, 5]).length, 3);
+```
+
+`sym([1, 2, 5], [2, 3, 5], [3, 4, 5])` should return `[1, 4, 5]`
+
+```js
+assert.sameMembers(sym([1, 2, 5], [2, 3, 5], [3, 4, 5]), [1, 4, 5]);
+```
+
+`sym([1, 2, 5], [2, 3, 5], [3, 4, 5])` should contain only three elements.
+
+```js
+assert.equal(sym([1, 2, 5], [2, 3, 5], [3, 4, 5]).length, 3);
+```
+
+`sym([1, 1, 2, 5], [2, 2, 3, 5], [3, 4, 5, 5])` should return `[1, 4, 5]`.
+
+```js
+assert.sameMembers(sym([1, 1, 2, 5], [2, 2, 3, 5], [3, 4, 5, 5]), [1, 4, 5]);
+```
+
+`sym([1, 1, 2, 5], [2, 2, 3, 5], [3, 4, 5, 5])` should contain only three elements.
+
+```js
+assert.equal(sym([1, 1, 2, 5], [2, 2, 3, 5], [3, 4, 5, 5]).length, 3);
+```
+
+`sym([3, 3, 3, 2, 5], [2, 1, 5, 7], [3, 4, 6, 6], [1, 2, 3])` should return `[2, 3, 4, 6, 7]`.
+
+```js
+assert.sameMembers(
+  sym([3, 3, 3, 2, 5], [2, 1, 5, 7], [3, 4, 6, 6], [1, 2, 3]),
+  [2, 3, 4, 6, 7]
+);
+```
+
+`sym([3, 3, 3, 2, 5], [2, 1, 5, 7], [3, 4, 6, 6], [1, 2, 3])` should contain only five elements.
+
+```js
+assert.equal(
+  sym([3, 3, 3, 2, 5], [2, 1, 5, 7], [3, 4, 6, 6], [1, 2, 3]).length,
+  5
+);
+```
+
+`sym([3, 3, 3, 2, 5], [2, 1, 5, 7], [3, 4, 6, 6], [1, 2, 3], [5, 3, 9, 8], [1])` should return `[1, 2, 4, 5, 6, 7, 8, 9]`.
+
+```js
+assert.sameMembers(
+  sym(
+    [3, 3, 3, 2, 5],
+    [2, 1, 5, 7],
+    [3, 4, 6, 6],
+    [1, 2, 3],
+    [5, 3, 9, 8],
+    [1]
+  ),
+  [1, 2, 4, 5, 6, 7, 8, 9]
+);
+```
+
+`sym([3, 3, 3, 2, 5], [2, 1, 5, 7], [3, 4, 6, 6], [1, 2, 3], [5, 3, 9, 8], [1])` should contain only eight elements.
+
+```js
+assert.equal(
+  sym([3, 3, 3, 2, 5], [2, 1, 5, 7], [3, 4, 6, 6], [1, 2, 3], [5, 3, 9, 8], [1])
+    .length,
+  8
+);
+```
+
+# --seed--
+
+## --seed-contents--
+
+```js
+function sym(args) {
+  return args;
+}
+
+sym([1, 2, 3], [5, 2, 1, 4]);
+```
+
+# --solutions--
+
+```js
+function sym() {
+  var arrays = [].slice.call(arguments);
+  return arrays.reduce(function (symDiff, arr) {
+    return symDiff.concat(arr).filter(function (val, idx, theArr) {
+      return theArr.indexOf(val) === idx
+        && (symDiff.indexOf(val) === -1 || arr.indexOf(val) === -1);
+    });
+  });
+}
+sym([1, 2, 3], [5, 2, 1, 4]);
+```