chore(i8n,learn): processed translations

curriculum/challenges/espanol/10-coding-interview-prep/rosetta-code/s-expressions.md

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+---
+id: 59667989bf71cf555dd5d2ff
+title: S-Expressions
+challengeType: 5
+forumTopicId: 302303
+dashedName: s-expressions
+---
+
+# --description--
+
+[S-Expressions](https://en.wikipedia.org/wiki/S-Expression "wp: S-Expression") are one convenient way to parse and store data.
+
+# --instructions--
+
+Write a simple reader/parser for S-Expressions that handles quoted and unquoted strings, integers and floats.
+
+The function should read a single but nested S-Expression from a string and return it as a (nested) array.
+
+Newlines and other whitespace may be ignored unless contained within a quoted string.
+
+"`()`" inside quoted strings are not interpreted, but treated as part of the string.
+
+Handling escaped quotes inside a string is optional; thus "`(foo"bar)`" may be treated as a string "`foo"bar`", or as an error.
+
+For this, the reader need not recognize "<code>\\</code>" for escaping, but should, in addition, recognize numbers if the language has appropriate data types.
+
+Note that with the exception of "`()"`" ("<code>\\</code>" if escaping is supported) and whitespace there are no special characters. Anything else is allowed without quotes.
+
+The reader should be able to read the following input
+
+<pre>((data "quoted data" 123 4.5)
+(data (!@# (4.5) "(more" "data)")))
+</pre>
+
+and turn it into a native data structure. (See the [Pike](https://rosettacode.org/wiki/S-Expressions#Pike "\#Pike"), [Python](https://rosettacode.org/wiki/S-Expressions#Python "\#Python") and [Ruby](https://rosettacode.org/wiki/S-Expressions#Ruby "\#Ruby") implementations for examples of native data structures.)
+
+# --hints--
+
+`parseSexpr` should be a function.
+
+```js
+assert(typeof parseSexpr === 'function');
+```
+
+`parseSexpr('(data1 data2 data3)')` should return `['data1', 'data2', 'data3']`
+
+```js
+assert.deepEqual(parseSexpr(simpleSExpr), simpleSolution);
+```
+
+`parseSexpr('(data1 data2 data3)')` should return an array with 3 elements.
+
+```js
+assert.deepEqual(parseSexpr(basicSExpr), basicSolution);
+```
+
+# --seed--
+
+## --after-user-code--
+
+```js
+const simpleSExpr = '(data1 data2 data3)';
+const simpleSolution = ['data1', 'data2', 'data3'];
+
+const basicSExpr = '((data "quoted data" 123 4.5) (data (!@# (4.5) "(more" "data)")))';
+const basicSolution = [["data","\"quoted data\"",123,4.5],["data",["!@#",[4.5],"\"(more\"","\"data)\""]]];
+```
+
+## --seed-contents--
+
+```js
+function parseSexpr(str) {
+
+  return true;
+}
+```
+
+# --solutions--
+
+```js
+function parseSexpr(str) {
+  const t = str.match(/\s*("[^"]*"|\(|\)|"|[^\s()"]+)/g);
+  for (var o, c = 0, i = t.length - 1; i >= 0; i--) {
+    var n,
+      ti = t[i].trim();
+    if (ti == '"') return;
+    else if (ti == '(') t[i] = '[', c += 1;
+    else if (ti == ')') t[i] = ']', c -= 1;
+    else if ((n = +ti) == ti) t[i] = n;
+    else t[i] = `'${ti.replace('\'', '\\\'')}'`;
+    if (i > 0 && ti != ']' && t[i - 1].trim() != '(') t.splice(i, 0, ',');
+    if (!c) if (!o) o = true; else return;
+  }
+  return c ? undefined : eval(t.join(''));
+}
+```