freecodecamp

Sum All Primes 1. Requirements Sum of prime numbers less than or equal to a given number. Only 1 and its own two approximate numbers are called prime numbers. For example, 2 is a prime number, because it can only be divisible by 1 and 2. 1 is not a prime number because it can only be divisible by itself. 2. Ideas To define the mark variable in a loop starting from 3 to no more than NUM, initially true Determines whether I is a prime number in a two-layer cycl

Make a person 1. Requirements Constructs an object using the method given below: Getfirstname (), Getlastname (), Getfullname (), Setfirstname (first), Setlastname (last), and Setfullname (Firstandlast). All methods that have parameters accept only one string parameter. All methods interact with the entity object only. 2. Ideas Based on the relevant links, an object is constructed using the method given in the topic. Constructing objects 3. Codevar Perso

DNA Pairing1. Requirements The DNA Strand lacks a paired base. Based on each base, the matching base is found, and the result is returned as a second array. Base pairs (base pair) is a pair of at and CG that matches the missing base for a given letter. The letters and the letters to which they are paired are inside an array, and then all the arrays are organized and encapsulated into an array. 2. Ideas Use. Split (") to divide the entered letter string into an alph

} returnNEWARR; } largestoffour ([[4, 5, 1, 3], [13, 27, 18, 26], [32, 35, 37, 39], [1000, 1001, 857, 1]];//back to [5,27,39,1001]We add a min and Max method to the array's prototype to determine the maximum and minimum values of the current array.Min Method:function () { varThis [0]; for (var i=0;ithis. length;i++) { if(This [i]// If the current value is less than the previous one, it is treated as the minimum value min= this

Freecodecamp's JavaScript basic algorithm challengeHttps://www.freecodecamp.com2016-07-03JavaScript is not very familiar with the knowledge to solve these problems, it is estimated that some algorithms will be very stupid.1. Invert stringsStr.split (

The small navigation bar has big secrets ., Navigation bar secret The author recently joined FreeCodeCamp, A GitHub open-source project, and is also a recognized online school. At FreeCodeCamp, the author encountered difficulties following the progress. At the beginning, the navigation bar made me hard. Of course, I have also written many web pages before, and I have done a lot of navigation bars, and almo

a string containing all the array direction. If you do not pass any value to the join () method or pass in undefined, use a comma as the delimiter.today's summary:before also practiced in the Freecodecamp, and Codewars different is the Freecodecamp comparative basis, do exercise when there are corresponding method hints, do not need to think can be based on the method to test, So just know the existence of

Header: This is my first blog, I hope this dish chicken summary can help me find the direction of the effort. Maybe I can help a couple of college dogs that I have a similar situation with? Anyway, I now feel that this piece of stuff can not be seen except me. HHhH ...Body:/* July 29 added Freecodecamp to the front end of the study. Probably backwards three months in codecadymy learned the basic syntax of Python and JS. Backwards pushes the python and

practice. Some of the better items are recommended:3.1 Freecodecamp A project abroad, can exercise your English ability very well. (Requires FQ)3.2 Baidu front-end Technical college students are mostly, there is a good atmosphere for discussion.A point, in the process of doing this project may encounter do not know how to start the situation, the proposal in addition to check the manual thought do not go to Baidu to find the answer, go to you in the

Strictly judge NaN in JavaScript, while javascript judges nan I also encountered this question on FreeCodeCamp: Delete all values in the array. In JavaScript, the false values include false, null, 0, "", undefined, and NaN. For NaN judgment, JS provides the function isNaN (). However, the isNaN () function can only determine whether the variable is not a number, but not whether the variable value is NaN. Therefore, the nature of the application N

When studying on Freecodecamp, I encountered the problem of acquiring geographical coordinates. Write a note on the record.if (navigator.geolocation) { navigator.geolocation.getCurrentPosition ( function (position) { Console.log (position.coords.longitude); Console.log (position.coords.latitude); }, function (e) { throw(e.message); } ) }JS gets the geographic coordinates of the curren

Afternoon on the FCC (freecodecamp) Chinese online to do an exercise: the given number into Roman numerals . Tortured for one hours, finally can give the basic ability to achieve. The process is as follows: About Roman Numerals A detailed description of the Roman numerals can be found in Baidu, or Roman numerals. Here is a brief introduction (the picture is selected from Roman numerals): 1. Roman numerals use 7 Roman l

analysis of startups, commenting on new Internet products, and exposure to technology news The Verge: More product-oriented technology news Recode: Technology information focused on Silicon Valley business Gsmarena.com: Latest mobile phone and Android-related news Product Hunt: Discover your next favorite thing Alternativeto: Crowdsourcing software recommendations Better Dev Links: A weekly link to help you become a better developer Devopslinks: The network community of thousands of developers

The following is a summary of the JavaScript array method. I think this is quite good. I want to share it with you and give you a reference. Because I recently used freecodecamp to write code and used many JavaScript Array methods, therefore, I made a summary of the JavaScript tutorial. The specific content is as follows: I. Common Methods 1. join () concatenates array elements and returns them as strings.Parameter: (optional) delimiter between eleme

99% of information We read, we forget anyway. The best-of-the-remember is-to-do. OriginRecently in the freecodecamp above to learn the front-end knowledge, unconsciously have learned 319 lessons, now encountered a small project is to do a tic-tac-word game. Speaking of well word game, really full of childhood taste, still remember the most crazy time is a child with a table with a draft paper can play a lesson, back home with younger brother can

learnAnswer 19: Answering 19:freecodecamp and Codecademy is a good way to get started.Question 20: In the technology selection, based on what considerations, the choice of vue, not reactAnswer 20: As compared to react, our company uses Vue more than the front end. To take care of most people, we use Vue as the framework for Element.Question 21: I also found that the event is useful but not easy to control in the component communication of Vue, so it

Summary and analysis of JavaScript Array methods, Summary of javascript Array Since freecodecamp has recently been used for code refreshing and many JavaScript Array methods, I have made a summary of the JavaScript tutorial. The specific content is as follows: I. Common Methods 1. join () concatenates array elements and returns them as strings.Parameter: (optional) delimiter between elements. If no parameter is specified, it is a comma by default.Retu

Today in Freecodecamp brush the problem, encountered a question is about string inversion. Reversing a string is one of the common face questions in JavaScript. Maybe the interviewer will give you a string "Hello word!" that lets you turn it into a "!drow Olleh" by using the JavaScript method. I am also a beginner, using the previous study of the array-related knowledge and the topic of the tips, I was a pass, and later thought, is there any other wa

Recently began to learn on the Freecodecamp, the JavaScript algorithm part of the topic to record, strengthen their knowledge points, but also easy to review later.Topic Description:Find the longest word in the provided sentence and calculate its length.The return value of the function should be a number. Ideas:The implementation is simple, split () splits the string, and then loops to determine the longest character length.Here's a Math.max () metho

Thanks to the recent brush code on Freecodecamp and the use of many JavaScript array methods, a tutorial on JavaScript is organized, as follows: I. Common methods 1. Join () joins the array elements together and returns as a stringParameters: Optional, specifies the delimiter between elements, and the default is comma without argumentsreturn value: StringEffects on the original array: none 2, reverse () the sequence of elements of the array into re