From ab08c40a7a22ea87d072aab4ad20e2a5611f9796 Mon Sep 17 00:00:00 2001
From: Jonah <jonahkf@gmail.com>
Date: Tue, 17 Sep 2024 22:40:14 +0900
Subject: [PATCH 1/3] COMPLETE: Javascript30 Array Exercise 1

---
 04 - Array Cardio Day 1/index-START.html | 32 ++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/04 - Array Cardio Day 1/index-START.html b/04 - Array Cardio Day 1/index-START.html
index 0dcfd00f40..1b68651cb3 100644
--- a/04 - Array Cardio Day 1/index-START.html	
+++ b/04 - Array Cardio Day 1/index-START.html	
@@ -38,17 +38,33 @@
     
     // Array.prototype.filter()
     // 1. Filter the list of inventors for those who were born in the 1500's
+    const fifteen = inventors.filter(inventor => (inventor.year >= 1500 && inventor.year < 1600));
+    console.table(fifteen);
 
     // Array.prototype.map()
     // 2. Give us an array of the inventors first and last names
+    const fullnames = inventors.map(inventor => `${inventor.first} ${inventor.last}`);
+    console.log(fullnames);
 
     // Array.prototype.sort()
     // 3. Sort the inventors by birthdate, oldest to youngest
+    const ordered = inventors.sort((a, b) => a.year > b.year ? 1 : -1);
+    console.table(ordered);
 
     // Array.prototype.reduce()
     // 4. How many years did all the inventors live all together?
+    const totalYears = inventors.reduce((total, inventor) => {
+      return total + (inventor.passed - inventor.year);
+    }, 0);
+    console.log(totalYears);
 
     // 5. Sort the inventors by years lived
+    const oldest = inventors.sort((a, b) => {
+      const lastGuy = a.passed - a.year;
+      const newGuy = b.passed - b.year;
+      return lastGuy > newGuy ? -1 : 1;
+    });
+    console.table(oldest);
 
     // 6. create a list of Boulevards in Paris that contain 'de' anywhere in the name
     // https://en.wikipedia.org/wiki/Category:Boulevards_in_Paris
@@ -56,11 +72,27 @@
 
     // 7. sort Exercise
     // Sort the people alphabetically by last name
+    const alpha = people.sort((a, b) => {
+      const [aLast, aFirst] = a.split(", ");
+      const [bLast, bFirst] = b.split(", ");
+      return aLast > bLast ? 1 : -1;
+    });
+    console.log(alpha);
 
     // 8. Reduce Exercise
     // Sum up the instances of each of these
     const data = ['car', 'car', 'truck', 'truck', 'bike', 'walk', 'car', 'van', 'bike', 'walk', 'car', 'van', 'car', 'truck' ];
 
+    const transportation = data.reduce((obj, item) => {
+      if(!obj[item]){
+        obj[item] = 0;
+      }
+      obj[item]++;
+      return obj;
+    }, {});
+
+    console.log(transportation);
+
   </script>
 </body>
 </html>

From 3c80bf316b9ea35475b0aaeedbe36c452a9feffa Mon Sep 17 00:00:00 2001
From: Jonah <jonahkf@gmail.com>
Date: Wed, 18 Sep 2024 08:21:08 +0900
Subject: [PATCH 2/3] COMPLETE: Javascript30 Array Exercise Day 2

---
 07 - Array Cardio Day 2/index-START.html | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/07 - Array Cardio Day 2/index-START.html b/07 - Array Cardio Day 2/index-START.html
index 4ca34c7536..1c2123e85a 100644
--- a/07 - Array Cardio Day 2/index-START.html	
+++ b/07 - Array Cardio Day 2/index-START.html	
@@ -27,15 +27,29 @@
 
     // Some and Every Checks
     // Array.prototype.some() // is at least one person 19 or older?
+    const currentYear = (new Date()).getFullYear();
+    const isAdult = people.some((person) => (currentYear - person.year >= 19));
+    console.log({isAdult});
     // Array.prototype.every() // is everyone 19 or older?
+    const allAdults = people.every((person) => (currentYear - person.year >= 19));
+    console.log({allAdults});
 
     // Array.prototype.find()
     // Find is like filter, but instead returns just the one you are looking for
     // find the comment with the ID of 823423
+    const comment = comments.find(a => (a.id == 823423));
+    console.log(comment);
 
     // Array.prototype.findIndex()
     // Find the comment with this ID
     // delete the comment with the ID of 823423
+    const index = comments.findIndex(a => a.id == 823423);
+    const newComments = [
+      ...comments.slice(0, index),
+      ...comments.slice(index + 1),
+    ];
+    console.table(comments);
+    console.table(newComments);
 
   </script>
 </body>

From 4c16f3559f61c11da5aa389dd73860a524bca864 Mon Sep 17 00:00:00 2001
From: Jonah <jonahkf@gmail.com>
Date: Wed, 18 Sep 2024 08:40:57 +0900
Subject: [PATCH 3/3] Added Comment on ... spreading.

---
 07 - Array Cardio Day 2/index-START.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/07 - Array Cardio Day 2/index-START.html b/07 - Array Cardio Day 2/index-START.html
index 1c2123e85a..1f06c2fa38 100644
--- a/07 - Array Cardio Day 2/index-START.html	
+++ b/07 - Array Cardio Day 2/index-START.html	
@@ -47,7 +47,7 @@
     const newComments = [
       ...comments.slice(0, index),
       ...comments.slice(index + 1),
-    ];
+    ]; // ... to spread into array
     console.table(comments);
     console.table(newComments);