Array Cardio 💪💪

Global Variables


      const people = [
        { name: 'Wes', year: 1988 },
        { name: 'Kait', year: 1986 },
        { name: 'Irv', year: 1970 },
        { name: 'Lux', year: 2015 }
      ];

      const comments = [
        { text: 'Love this!', id: 523423 },
        { text: 'Super good', id: 823423 },
        { text: 'You are the best', id: 2039842 },
        { text: 'Ramen is my fav food ever', id: 123523 },
        { text: 'Nice Nice Nice!', id: 542328 }
      ];

Exercises:

Figure out if at least one person is 19 or older using Array.prototype.some()?

const someAdults = people.some((person) => ((new Date()).getFullYear() - person.year) >= 19);

Output:

true

Find out if everyone is 19 or older using Array.prototype.every()?
```
const allAdults = people.every((person) => (((new Date()).getFullYear() - person.year) >= 19));  
```
Output: (false at the time this was written 2019)
```
false
```
The find function, Array.prototype.find(), is like filter, but instead returns just the one you are looking for. Find the comment with the ID of 823423 using this method.
```
const comment = comments.find((comment) => comment.id === 823423);
```
Output

Find the comment with this ID then delete the comment with the ID of 823423 using Array.prototype.findIndex().


const deleteComment = (ID) => {
  const index = comments.findIndex(com => (com.id === ID));
  if(index < 0) { // If not found, return
    console.log(`ERROR: ${ID} could not be found.`)
    return;
  }
              
  console.log(`Deleteing ${comments[index].id}........`);
  // METHOD: 1
  // comments.splice(index, 1) // Edits original array

  // METHOD: 2
  // Create new array and use slice
  const newComments = [
    ...comments.slice(0, index),
    ...comments.slice(index + 1)
  ];
  console.log('SUCCESS');
      
  return newComments;
}

Normal Output:


// deleteComment(823423);

Output with error:


// deleteComment(823203);

Day 7: Array Cardio II 💪💪

Global Variables

Exercises: