docs(array): fix examples

Author: amejiarosario

book/chapters/array.adoc

@@ -126,7 +126,20 @@ Searching by index takes a constant time, *O(1)*, to retrieve values out of the
 .Search by index
 [source, javascript]
 ----
-include::{codedir}/data-structures/arrays/array.js[tag=searchByIndex]
+/**
+ * Search for array's element by index
+ *
+ * @example Given array = [2, 5, 1, 9, 6, 7, -1];
+ *    searchByIndex(array, 3); //↪️ 9
+ *    searchByIndex(array, 6); //↪️ -1
+ *    searchByIndex(array, 13); //↪️ undefined
+ * @param {array} array
+ * @param {number} index
+ * @returns {any} value or undefined if not found
+ */
+function searchByIndex(array, index) {
+  return array[index];
+}
 ----
 
 Finding out if a value is in the array or not is a different story.
@@ -136,7 +149,22 @@ Finding out if a value is in the array or not is a different story.
 .Search by value
 [source, javascript]
 ----
-include::{codedir}/data-structures/arrays/array.js[tag=searchByValue]
+/**
+ * Search for array's element by value
+ *
+ * @example Given array = [2, 5, 1, 9, 6, 7];
+ *    searchByValue(array, 9); //↪️ 3
+ *    searchByValue(array, 13); //↪️ -1
+ * @param {array} array
+ * @param {any} value
+ */
+function searchByValue(array, value) {
+  for (let index = 0; index < array.length; index++) {
+    const element = array[index];
+    if (element === value) return index;
+  }
+  return -1;
+}
 ----
 
 We would have to loop through the whole array (worst case) or until we find it: *O(n)*.

src/data-structures/arrays/array.js

@@ -1,6 +1,6 @@
 /* eslint-disable */
-const assert = require('assert');
 
+// see: book/chapters/array.adoc
 
 const array = [2, 5, 1, 9, 6, 7]; // JavaScript
 array[4]; //=> 6
@@ -31,45 +31,3 @@ array.splice(2, 1); // delete 1 element at position 2
 
 // Deleting last element from the array
 array.pop(); // => array: [2, 5, 1, 9, 6]
-
-
-// tag::searchByIndex[]
-/**
- * Search for array's element by index
- *
- * @example Given array = [2, 5, 1, 9, 6, 7];
- *    searchByIndex(array, 3); //↪️ 9
- *    searchByIndex(array, 13); //↪️ -1
- * @param {array} array
- * @param {number} index
- * @returns {any} value or -1 if not found
- */
-function searchByIndex(array, index) {
-  return array[index] || -1;
-}
-// end::searchByIndex[]
-
-assert.equal(searchByIndex(array, 3), 9);
-assert.equal(searchByIndex(array, 13), -1);
-
-// tag::searchByValue[]
-/**
- * Search for array's element by value
- *
- * @example Given array = [2, 5, 1, 9, 6, 7];
- *    searchByValue(array, 9); //↪️ 3
- *    searchByValue(array, 13); //↪️ -1
- * @param {array} array
- * @param {any} value
- */
-function searchByValue(array, value) {
-  for (let index = 0; index < array.length; index++) {
-    const element = array[index];
-    if (element === value) return index;
-  }
-  return -1;
-}
-// end::searchByValue[]
-
-assert.equal(searchByValue(array, 9), 3);
-assert.equal(searchByValue(array, 13), -1);