##Array Cardio 1
1.
```javascript
var newInventors = inventors.filter(function(inventor) {
    if(inventor.year >= 1500 && inventor.year < 1600) {
        return true;
    }
});
console.log(newInventors);
```

2.
```javascript
var fullNames = inventors.map(function(inventor){
    return inventor.first + ' ' + inventor.last;
});
console.table(fullNames);
```

3.
```javascript
var sortedBirthdays = inventors.sort(function(a, b) {
    if(a.year > b.year) {
        return 1;
    } else {
        return -1;
    }
});
console.table(sortedBirthdays);
```

4.
```javascript
var yearsLived = inventors.reduce(function(newArray, inventor) {
    newArray.push(inventor.passed - inventor.year);
    return newArray;
}, []});
console.table(yearsLived);
```

5.
```javascript
var oldest = inventors.sort(function(a, b) {
    var lastGuy = a.passed - a.year;
    var nextGuy = b.passed - b.year;
    return lastGuy > nextGuy ? -1 : 1;
});
console.table(oldest);
```
6.
```javascript
var category = document.querySelector('mw-category');
links = Array.from(category.querySelectorAll('a'));
var de = links.map(link => link.textContent).filter(streetName => streetName.includes('de'));
```
7.
```javascript
var lastNameSort = people.sort((a, b) => a.split(' ')[0] > b.split(' ')[0] ? 1 : -1);
console.table(lastNameSort);
```
8.
```javascript
var transportation = data.reduce(function(obj, item) {
      if (!obj[item]) {
        obj[item] = 0;
      }
      obj[item]++;
      return obj;
    }, {});
    console.log(transportation);
```
##Array Cardio Day 2
1.
```javascript
var currentYear = new Date().getFullYear();
var nineteen = function(person) {
    if(currentYear - person.year) {
        return true;
    } else {
        return false
    }
};
console.log(people.some(nineteen));
```
2.
```javascript
var currentYear = new Date().getFullYear();
var adults = people.every(person => (currentYear - person.year >= 19);
console.log(allAdults);
```
3.
```javascript
var oneComment = comments.find(function(comment){
    return comment.id == 823423;
});
console.log(oneComment);
```
4.
```javascript
var commentIndex = comments.findIndex(function(comment){
    return target = comment.id == 823423;
});
comments.splice(commentIndex, commentIndex);
console.table(comments);
```