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나는 이렇게 학습한다/Algorithm & SQL405

0107. Exclamation marks series #4: Remove all exclamation marks from sentence but ensure a exclamation mark at the end of string Description: Remove all exclamation marks from sentence but ensure a exclamation mark at the end of string. For a beginner kata, you can assume that the input data is always a non empty string, no need to verify it. Examples remove("Hi!") === "Hi!" remove("Hi!!!") === "Hi!" remove("!Hi") === "Hi!" remove("!Hi!") === "Hi!" remove("Hi! Hi!") === "Hi Hi!" remove("Hi") === "Hi!" Solution: const remo.. 2023. 1. 7.
0106. Is there a vowel in there? Given an array of numbers, check if any of the numbers are the character codes for lower case vowels (a, e, i, o, u). If they are, change the array value to a string of that vowel. Return the resulting array. Solution: function isVow(a){ for (let index in a) { let vow = String.fromCharCode(a[index]) if (["a", "e", "i", "o", "u"].includes(vow)) { a[index] = vow } } return a } const isVow = a => a.. 2023. 1. 7.
0105. Greet Me Write a method that takes one argument as name and then greets that name, capitalized and ends with an exclamation point. Example: "riley" --> "Hello Riley!" "JACK" --> "Hello Jack!" Solution: var greet = function(name) { modifiedName = name.charAt(0).toUpperCase() + name.slice(1).toLowerCase() return `Hello ${modifiedName}!` }; var greet = function(name) { return 'Hello ' + name[0].toUpperCase(.. 2023. 1. 5.
0104. Sleigh Authentication Christmas is coming and many people dreamed of having a ride with Santa's sleigh. But, of course, only Santa himself is allowed to use this wonderful transportation. And in order to make sure, that only he can board the sleigh, there's an authentication mechanism. Your task is to implement the authenticate() method of the sleigh, which takes the name of the person, who wants to board the sleigh .. 2023. 1. 4.
0103. Powers of 2 Complete the function that takes a non-negative integer n as input, and returns a list of all the powers of 2 with the exponent ranging from 0 to n ( inclusive ). Examples n = 0 ==> [1] # [2^0] n = 1 ==> [1, 2] # [2^0, 2^1] n = 2 ==> [1, 2, 4] # [2^0, 2^1, 2^2] Solution: def powers_of_two(n: str) -> list[int]: return [pow(2, i) for i in range(n+1)] 2023. 1. 3.
0102. Enumerable Magic #25 - Take the First N Elements Create a function that accepts a list/array and a number n, and returns a list/array of the first n elements from the list/array. Solution: def take(arr, n): result = [] arrs = [arr[i-1:i] for i in range(1, n+1)] for arr in arrs: result += arr return result 2023. 1. 3.

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