Complete the function/method so that it takes a PascalCase string and returns the string in snake_case notation. Lowercase characters can be numbers. If the method gets a number as input, it should return a string.
Your task is to create a function that will take an integer and return the result of the look-and-say function on that integer. This should be a general function that takes as input any positive integer, and returns an integer; inputs are not limited to the sequence which starts with "1".
Write a function named first_non_repeating_letter† that takes a string input, and returns the first character that is not repeated anywhere in the string.
Your task in order to complete this Kata is to write a function which formats a duration, given as a number of seconds, in a human-friendly way.
Write a function that, given a string of text (possibly with punctuation and line-breaks), returns an array of the top-3 most occurring words, in descending order of the number of occurrences.
Write a function that takes in a string of one or more words, and returns the same string, but with all words that have five or more letters reversed (Just like the name of this Kata). Strings passed in will consist of only letters and spaces. Spaces will be included only when more than one word is present.
You probably know the "like" system from Facebook and other pages. People can "like" blog posts, pictures or other items. We want to create the text that should be displayed next to such an item.