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Http://www.codewars.com/kata/54ff3102c1bad923760001f3/solutions/csharpDetermines how many a given string has a E i o uusing System; using System.Linq; Public Static class kata{ publicstaticint getvowelcount (string str) { return"aeiou". INDEXOF (x)! =-1); }} Public Static classkata{ Public Static intGetvowelcount (stringstr) { returnStr. Where (c =New[] {'a','e','I','o','u'}. Any (v = v = =c)). Count (); }}http://www.codewars.com/kata/5506b230a11c0aeab3000c1fusing Syst

, undefined, or null, it returns FALSE.Number (value)----Converts the given value to a digit (which can be an integer or a floating point)string (value) ----to convert the given value to a stringWeak-type conversion of 3,JS (arithmetic operations only, string-to-number conversion is implemented)var str= "012.345";x=x*1; Return number 12.3454. Methods for other commonly used math objectsMath.Abs (-1); 1Math.log (1); Logarithm of base E, 0Math.max (a); 3Math.min (1,23); 1Math.random (); Returns th

The problem is codewars, in short: finding and combining different integers for an integer. Https://en.wikipedia.org/wiki/Partition_ (Number_theory)For example: The combination of integers with 6 has the following 11 kinds,65 + 14 + 24 + 1 + 13 + 33 + 2 + 13 + 1 + 1 + 12 + 2 + 22 + 2 + 1 + 12 + 1 + 1 + 1 + 1 + 11 + 1 + 1 + 1 + 1 + 1Solution One:To avoid repetition, we can choose to gradually decrement the first addend until it is not less than half of

) { if (adigitlast% 2 = 1 firststr!== adigitlast) { Maparr = [2, 4, 6, 8] However, there is no egg to use, the execution time is almost the same as the previous algorithm.So, search for relevant answers on the web and find a solution for a big guy: function Guessexpression (exp) {let m = Exp.match ([\w\d]+)/g); Let sym = [m[0], m[1]]; Let res = +m[2]; Let Uniq = (Sym[0] + sym[1]). Split (") . Filter (EL, I, arr) => Arr.indexof (el, i+1) = = 1); Let nums = new

implementation of 1> Isint ()Isint () in the above code indicates whether a number is an integer, or true, otherwise false.Of course, there is no need to use the function, the simple expression will be more convenient, here just to occupy bits.So the question is, how do you tell if a number is an integer?Before I play this problem, I know there are these methods:A>math.floor (num) = = numRounding a given number, or an integer if it is equal to the original number.B>parseint (num) = = numThe sam

: function factorial (n) { var res = [1]; for (var i = 2; I i) { var c = 0; //c for rounding for (var j = 0; J j) {C /span>+= (Res[j] | | 0) * I; RES[J] = c% 10; //to find out bits, 10, hundred ... The number of c = Math.floor (C/10 return res.reverse (). Join (" Also found directly in Python do, there is no such problem arises. (Recursive method)def Fun (n): if n0: return null elifor n==1: return"1" Else: return N*fun (n-1)Use for loopdef

loops.forEachCan be used as for(let i = 0; i shorthand, but cannot complete i + n this cycle, but also does not support continue and break , only through return to control the loop. In addition, it forEach is not possible to exit the loop itself; foreach is good for sparse matrix processing and does not process an empty array.(2) Comparison with mapHttps://www.cnblogs.com/liuruyi/p/6483526.htmlCommon:1. All loops iterate through each item in the array.Each execution of the anonymous function i

1.ES6 array traversal syntax sugar =It was used in c#linq, so it's not very strange.var range = array.apply (null, Array (x)). Map ((_, i) = = ++i);A method for filling an empty array with apply is applied.Apply applies to arrays as well: passing an

This is a codewars above level 3 question.Original question:Description:I ' m sure, you know Google's "Did you mean ...?" When you entered a search term and mistyped a word. In this kata we want to implement something similar.You'll get a entered term (lowercase string) and an array of known words (also lowercase strings). Your task is to find out, which word from the dictionary are most similar to the entered one. The similarity is described by the m

Practice Platform Codewars Address: https://www.codewars.com/Welcome to discuss ~╭ (???) with everyone? ??Basic Exercises (1):My answer is:class Smallestintegerfinder { findsmallestint (args) { var a = Args[0]; for (var i=0; i) { if(Args[i] a) { = args [i]; } } return A; }}The better answer is:class Smallestintegerfinder { findsmallestint (args) { return Math.min.apply (null , args);} }Analysis:It can be seen t

Off TopicAfter brushing the Codewars JavaScript topic for a while, it gives me the greatest feeling that will help you to quickly improve the familiarity of the APIs that you want to practise, the native methods of array objects, string objects, constructors, some algorithmic questions, and so On. After each submit, look at your code, and then look at the code that someone else Wrote. Find yourself writing code and implementation ideas are simply Weak

Assembly teaches you how to use Html+css+javascript to make websites and provide a variety of instructional videos.4.ReplitReplit has a wealth of learning resources that developers can choose to learn in any language, such as Ruby, PHP, Python, JavaScript, and more.5.CodewarsDevelopers can learn a variety of programming languages on the Codewars, and the Codewars reward system encourages programmers to do

This problem is very easy, but there are some usages that we can learn. Topic Requirements: Find the number of positive numbers in a vector, and the number of negative numbers. First, the solution fn count_positives_sum_negatives (input:vec I also made some efforts to one-step, but did not succeed. Such as: The following are non valid code attempts 1 fn count_positives_sum_negatives2 (input:vec The following are non valid code attempts 2 fn count_positives_sum_negatives2 (input:vec In fact, t

spiral matrix, when the rookie did not do it, time after their own computer thinking, and then suddenly understand the mystery. Although the blogger didn't record the code at the time, I first defined a two-dimensional array of n*n, to get the need to go around a few layers, such as the above is 2 layers, and then the cycle several times, in the internal use of four for loop, is up or down to the definition of two-dimensional array interpolation content, the specific code can not on, anyway, t

Algorithm: is to give the chemical formula, in accordance with the required format for output. Examples are as follows: Parse_molecule ("H2O"); Water //Ok ([("H", 2), ("O", 1)]) parse_molecule ("Mg (OH) 2"); Magnesium hydroxide //Ok ([("Mg", 1), ("O", 2), ("H", 2)] parse_molecule ("K4[on (SO3) 2]2");//Fremy ' s salt //Ok ([("K", 4), ("O",), ("N", 2), ("S", 4)]) parse_molecule ("pie") //ERR (ParseError) where, Ok ([("K", 4), ("O", "(" N ",

The question of matching JS brackets is a question of matching brackets on codewars. Question To determine whether the brackets {}, [], and () in the string match, consider nesting. Example: validBraces("(){}[]") // true validBraces("(}") // false validBraces("[(])") // false validBraces("([{}])") // true Solution There are only two situations at the root of this problem. One is parallel, that is, no nesting, such as () [] {}; t

Float rounding Keep Two decimal places note the placeRecently in Codewars did a very simple topic, but it took me 20 minutes, although the final solution, but in the middle found that the foundation of Java is not really, go back to a good fixDo not say so much, on the topic: is to write a method, the mileage per gallon conversion into kilometers per liter, keep two digitsAt the beginning of the writing is no problem, the problem appears in the retent

Let's take a look at a question. This is a question on codewars. I have seen it very early, but I won't write it. When I saw this question again, I had just read the Yuan programming book and thought it was time to solve it. Not much nonsense. Let's take a look at this question first. The question was first written for Javascript, but it was also included in the ruby language. It doesn't matter. The question content is a class of calc, which can be ca

Find the Capitalsdescription:instructionsWrite a function, takes a single string ( word ) as argument. The function must return an ordered list containing the indexes of any capital letters in the string.ExampleAssert.AreEqual(Kata.Capitals("CodEWaRs"), new int[]{0,3,4,6});usingSystem;usingSystem.Linq; Public Static classkata{ Public Static int[] Capitals (stringword) { //Write Your code here int[] Array =New int[] { }; if(Word = =NULL|| Word =

programmers. The Hackerrank website has the combinator of Y and Svangel and other companies as sponsors. In a word, friends who have confidence in their personal level must not be missed.Codewars obviously found an excellent way to achieve the organization programming challenge, and the game content was very serious. I have struggled to help you understand the location of the site more comprehensively, but I believe the following 10-minute video will better demonstrate Codewars's practical role