Week 05 Day 2 - Function Junction

[gstark]

Objectives

After completing this assignment, you should be able to:

• Demonstrate understanding of types, functions, argument-handling, loops, and conditional statements

Requirements

1. Fork this repository to your own account.
2. Change into your training directory
3. Clone your repository: hub clone function-junction
4. Change into your project's directory: cd function-junction
5. Install the dependencies: yarn install (or just yarn for short)
6. Open in Code: code .
7. Start the test runner: yarn test
8. Open src/functions.test.js and work on functions until tests pass.
9. Commit and push your work to GitHub.
10. Turn in the URL to your GitHub repo.

Explorer Mode

• [ ] All tests passing
• [ ] No linter warnings
• [ ] Turn in the homework using the URL to your repository on Github.

Adventure Mode

• [ ] If you used "built-in" JavaScript methods like String.reverse() or Array.max() to solve these problems, try implementing them from scratch.
• [ ] Vice-versa: if you implemented your solutions from scratch, look in the documentation linked below to see if JavaScript has any built-in functions to help solve these problems.

Epic Mode

• [ ] Expand the sum and max functions to take arrays instead of numbers and update the tests so they pass.
• [ ] Create your own simple functions with tests.
• [ ] Anytime in your code that you used a for loop or a while loop, convert it to use a map, filter or reduce.

Additional Resources

Reference the documentation on MDN to find what kind of helpful functions might already be on Array and String in JavaScript.

• String Functions on MDN.
• Array Functions on MDN.

[AllanSeitz]

https://github.com/AllanSeitz/function-junction.git

i really enjoyed this, i was impressed with how well i could type the functions out from memory

[gstark]

Very nice.

Do you understand how Math.max(...array) works -- We haven't covered this in class so I want to make sure you understand that idiom if you are going to use it.

Also

  if (
    x === 'a' ||
    x === 'A' ||
    x === 'e' ||
    x === 'E' ||
    x === 'i' ||
    x === 'I' ||
    x === 'o' ||
    x === 'O' ||
    x === 'u' ||
    x === 'U'
  ) {
    return true
  } else {
    return false
  }

Could be just

  return (
    x === 'a' ||
    x === 'A' ||
    x === 'e' ||
    x === 'E' ||
    x === 'i' ||
    x === 'I' ||
    x === 'o' ||
    x === 'O' ||
    x === 'u' ||
    x === 'U'
  )

Since if you have

if (condition) {
  return true
} else {
  return false
}

it is the same as

return condition

[gstark]

Your homework is: Meets Expectations

[AllanSeitz]

my understanding is Math.max(...array) will spread the array then return the largest number above in the array, is that correct? On Thursday, October 4, 2018, 8:21:51 AM EDT, Gavin Stark notifications@github.com wrote:

Very nice.

Do you understand how Math.max(...array) works -- We haven't covered this in class so I want to make sure you understand that idiom if you are going to use it.

Also if ( x === 'a' || x === 'A' || x === 'e' || x === 'E' || x === 'i' || x === 'I' || x === 'o' || x === 'O' || x === 'u' || x === 'U' ) { return true } else { return false }

Could be just return ( x === 'a' || x === 'A' || x === 'e' || x === 'E' || x === 'i' || x === 'I' || x === 'o' || x === 'O' || x === 'u' || x === 'U' )

Since if you have if (condition) { return true } else { return false }

it is the same as return condition

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