feat: examples from chapter 7

Author: damianobacci

chapter-6/2_intersection.js

@@ -4,7 +4,7 @@ function intersection(firstArray, secondArray){
     for (let i = 0; i < firstArray.length; i++) {
         for (let j = 0; j < secondArray.length; j++) {
             if (firstArray[i] === secondArray[j]) {
-                result.push(firstArray[importScripts])
+                result.push(firstArray[i])
             }
         }
     }
@@ -16,7 +16,7 @@ function intersection(firstArray, secondArray){
     for (let i = 0; i < firstArray.length; i++) {
         for (let j = 0; j < secondArray.length; j++) {
             if (firstArray[i] === secondArray[j]) {
-                result.push(firstArray[importScripts])
+                result.push(firstArray[i])
                 break
             }
         }

chapter-7/1_average_even_numbers.rb

@@ -0,0 +1,12 @@
+def average_of_even_numbers(array)
+    sum = 0
+    count_of_even_numbers = 0
+
+    array.each do |number|
+        if number.even?
+            sum += number
+            count_of_even_numbers += 1
+        end
+    end
+    return sum / count_of_even_numbers
+end

chapter-7/2_word_builder.ts

@@ -0,0 +1,9 @@
+function wordBuilder(array: string[]): string[] {
+    let collection: string[] = []
+    for (let i = 0; i < array.length; i++) {
+        for (let j = 0; j < array.length; j++) {
+            if (i !== j) collection.push(array[i] + array[j])
+        }
+    }
+    return collection
+}

chapter-7/3_array_sample.py

@@ -0,0 +1,5 @@
+def sample(array):
+    first = array[0]
+    middle = array[int(len(array) / 2)]
+    last = array[-1]
+    return [first, middle, last]

chapter-7/4_average_celsius_reading.rb

@@ -0,0 +1,16 @@
+def average_celsius(fahrenheit_readings)
+    celsius_numbers = []
+
+    fahrenheit_readings.each do |fahrenheit_reading|
+        celsius_conversion = (fahrenheit_reading - 32) / 1.8
+        celsius_numbers.push(celsius_conversion)
+    end
+
+    sum = 0.0
+
+    celsius_numbers.each do |celsius_number|
+        sum += celsius_number
+    end
+
+    return sum / celsius_numbers.length
+end

chapter-7/5_mark_inventory.py

@@ -0,0 +1,7 @@
+def mark_invetory(clothing_items):
+    clothing_options = []
+
+    for item in clothing_options:
+        for size in range(1, 6):
+            clothing_options.append(item + " Size: " + str(size))
+    return clothing_options

chapter-7/6_count_ones.py

@@ -0,0 +1,8 @@
+def count_ones(outer_array):
+    count = 0
+
+    for inner_array in outer_array:
+        for number in inner_array:
+            if number == 1:
+                count += 1
+    return count

chapter-7/7_palindrome_checker.ts

@@ -0,0 +1,11 @@
+function isPalindrome(string: string): boolean {
+    let leftIndex: number = 0
+    let rightIndex: number = string.length - 1
+
+    while (leftIndex < string.length / 2) {
+        if (string[leftIndex] !== string[rightIndex]) return false
+        leftIndex++
+        rightIndex--
+    }
+    return true
+}