feat: add js solution to lc problem: No.1859.Sorting the Sentence (doocs#394)

Author: zhaocchen

solution/1800-1899/1859.Sorting the Sentence/README.md

@@ -84,6 +84,26 @@ class Solution {
 }
 ```
 
+### **JavaScript**
+
+```js
+/**
+ * @param {string} s
+ * @return {string}
+ */
+var sortSentence = function(s) {
+    let words = s.split(' ');
+    let n = words.length;
+    let res = new Array(n);
+    for (let word of words) {
+        let key = word.slice(-1);
+        let val = word.slice(0, -1);
+        res[parseInt(key) - 1] = val;
+    }
+    return res.join(' ');
+};
+```
+
 ### **...**
 
 ```

solution/1800-1899/1859.Sorting the Sentence/README_EN.md

@@ -85,6 +85,26 @@ class Solution {
 }
 ```
 
+### **JavaScript**
+
+```js
+/**
+ * @param {string} s
+ * @return {string}
+ */
+var sortSentence = function(s) {
+    let words = s.split(' ');
+    let n = words.length;
+    let res = new Array(n);
+    for (let word of words) {
+        let key = word.slice(-1);
+        let val = word.slice(0, -1);
+        res[parseInt(key) - 1] = val;
+    }
+    return res.join(' ');
+};
+```
+
 ### **...**
 
 ```

solution/1800-1899/1859.Sorting the Sentence/Solution.js

@@ -0,0 +1,15 @@
+/**
+ * @param {string} s
+ * @return {string}
+ */
+ var sortSentence = function(s) {
+    let words = s.split(' ');
+    let n = words.length;
+    let res = new Array(n);
+    for (let word of words) {
+        let key = word.slice(-1);
+        let val = word.slice(0, -1);
+        res[parseInt(key) - 1] = val;
+    }
+    return res.join(' ');
+};