kata-questions🤺

A repo containing a variety of short kata questions to practice Javascript.

1. Pangram

Task:

Implement a Pangram check function. This checks to see that an input string contains all of the letters of the English alphabet.

For Example:

• console.log(isPangram('The quick Brown fox jumps over the lazy Dog )) => True
• console.log(isPangram('The quick fox is brown')) => False

2. Beat Boxer

Task:

Implement Beat Boxer - toBeatBox()

if the number has 3 as a factor, output 'doof' if the number has 5 as a factor, output 'kapow' if the number has 7 as a factor, output 'kaching' otherwise, return the number

Example: console.log(toBeatBox(15)) //doofkapow console.log(toBeatBox(35)) //kapowkaching console.log(toBeatBox(21)) //doofkaching console.log(toBeatBox(2)) //2

3. isogram function

Task:

Implement an isogram check function. Isogram is a string where all letters are present only once.

Example: console.log(isIsogram('ladygAgA')) // false console.log(isIsogram('person')) //true

4. Leap Year function

Task:

implement function isLeapYear(). Leap years occur every four years (divisible by four). Leap years do not occur in century years, unless it is divisible by 400.

Example:

console.log(isLeapYear("2020")) // true console.log(isLeapYear("2018")) // false console.log(isLeapYear("1700")) // false console.log(isLeapYear("1600")) // true

5. Encode & Decode Function

Task:

implement functions that follow a run length encoding pattern. Run length encoding is a form of data compression, where consecutive data elements are replaced by just one data value and count of that value.

Example:

console.log(encode('wwwiiuuuu')) // 3w2i4u console.log(decode('2u3a4o')) // uuaaaooo

6. Remove Duplicate Values

Task:

Implement a function that removes the duplicate values from an array. Only using array.reduce()

Example:

console.log(removeDuplicateValues(['one', 'two', 'two', 'three', 'three'])) // ['one', 'two', 'three']

7. Implement array.map with reduce.

Task:

Implement your own array mapping function with reduce.

Example: console.log(map([1, 2, 3], (v) => v + 1)) // [2, 3, 4]

8. Flatten nested array

Task:

Implement a function that flattens a nested array using recursive reduce - makeFlat()

Example: console.log(makeFlat(["one", ["two", "three"], ["four", ["five"]]])) // ["one", "two", "three", "four", "five"]

9. Transpose Matrix

Task:

Implement a function that transposes a matrix array - transposeMatrix()

Example:

console.log(transposeMatrix( [ [1,2,3] [1,2,3] [1,2,3] ] )) // [[1,1,1],[2,2,2],[3,3,3]]

10. Find top word

Task:

Find the top word from a string of words.

Example:

console.log(topWord('The cat sat on the mat') // 'the'