JavaScript course coding exercise solutions

Author: evgenyrahman

exercise_1.js

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+function return_only_10_plus(){
+    let initial_array = [1, 21, 5, 6, 42, 8, 3, 10, 15]
+
+    //Populate the final array only with numbers greated than 10
+    let final_array = []
+
+    final_array = initial_array.filter(function(elem){
+        return elem > 10;
+    })
+    return final_array
+
+}

exercise_2.js

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+function greeting(message){
+  return "The message is: " + message;
+}

exercise_3.js

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+//You only need one function in your object - fly()
+let Bird = {
+    fly: function(){
+        return true;
+    }
+}

exercise_4.html

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+<div id="challenge">Can you change me?</div>
+
+<script>
+    var elem = document.getElementById("challenge");
+    elem.textContent = 'I did it!'
+</script>

exercise_5.js

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+function findTheObject() {
+  let investments = [
+                      {
+                          name: 'First',
+                          price: 0.50,
+                          type: 'Bond'
+                      },
+
+                      {
+                          name: 'Second',
+                          price: 1.75,
+                          type: 'ETF'
+                      },
+
+                      {
+                          name: 'Third',
+                          price: 1.50,
+                          type: 'Stock'
+                      }
+                    ];
+ return investments.filter(object => object.type == 'Stock');
+}

exercise_6.rb

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+my_stocks = { 'Apple' => { 'symbol' => 'AAPL', 'price' => 100 },
+              'Google' => { 'symbol' => 'GOOG', 'price' => 1150 },
+              'Tesla' => { 'symbol' => 'TSLA', 'price' => 295 },
+              'Microsoft' => { 'symbol' => 'MSFT', 'price' => 95},
+              'Netflix' => { 'symbol' => 'NFLX', 'price' => 300},
+              'Facebook' => { 'symbol' => 'FB', 'price' => 175},
+              'Amazon' => { 'symbol' => 'AMZN', 'price' => 1250} }
+
+def execute_exercise(my_stocks)
+    # 1) Print out all the symbols and prices, as they are stored as values in the hash above, using for loop
+    # Write your code below here, I have written this one for your convenience
+    for i, j in my_stocks
+      puts j
+    end
+
+    # 2) Print out all the symbols and prices if the price of the stock is above 500
+    # Write your code below here
+    for i, j in my_stocks
+      puts j if j["price"] > 500
+    end
+
+    # 3) Same task as above using .each
+    # Write your code below here, don't write past the end statement at the bottom
+    my_stocks.each do |i, j|
+      puts j if j["price"] > 500
+    end
+
+end