Home Web Front-end JS Tutorial JavaScript fun questions: What's in it?

JavaScript fun questions: What's in it?

Feb 13, 2017 pm 04:02 PM

It is known that there are two string arrays, let’s call them a1, a2.

The current task is to find all elements from a1 that are element substring in a2 and store them in a new array.

Sort this new array in lexicographic order and return it.

Let’s take an example:

a1 = ["arp", "live", "strong"]

a2 = ["lively", "alive" , "harp", "sharp", "armstrong"]


Return["arp", "live", "strong"]

Here, "arp" is a substring of "harp", "live" is a substring of "lively", So it can be returned.

Look at another example:

a1 = ["tarp", "mice", "bull"]

a2 = ["lively", "alive" ", "harp", "sharp", "armstrong"]


Return[]

herea1 None of them conform to the substring rules, so an empty array is returned.

Okay, let’s see how to solve it:

First of all, when I see the substring, I guess I need a way to judge whether it is a substring:


if(typeof String.prototype.isSubstringOf === "undefined"){
    String.prototype.isSubstringOf = function(str){
        return str.indexOf(this) >= 0;
    };
}
Copy after login

Then, go through a1 one by one and determine whether the current element is a substring of the element in a2. If so, push it into the new array.

Then, when the loop ends, the new array is filled.

How to do lexicographic sorting? Do we still need to write algorithms?

It’s not that complicated. JavaScript’s built-in sorting is dictionary order by default.

Then, just sort the new array directly and return it!


function inArray(array1,array2){
    var newArray = [];
    for(var i=0;i<array1.length;i++){
        var temp = array1[i];
        if(temp){
            for(var j=0;j<array2.length;j++){
                if(temp.isSubstringOf(array2[j])){
                    newArray.push(temp);
                    break;
                }
            }
        }
    }
    return newArray.sort();
}
Copy after login


The above is an interesting JavaScript question: What is in it? For more related content, please pay attention to the PHP Chinese website (www.php.cn)!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

What should I do if I encounter garbled code printing for front-end thermal paper receipts? What should I do if I encounter garbled code printing for front-end thermal paper receipts? Apr 04, 2025 pm 02:42 PM

Frequently Asked Questions and Solutions for Front-end Thermal Paper Ticket Printing In Front-end Development, Ticket Printing is a common requirement. However, many developers are implementing...

Who gets paid more Python or JavaScript? Who gets paid more Python or JavaScript? Apr 04, 2025 am 12:09 AM

There is no absolute salary for Python and JavaScript developers, depending on skills and industry needs. 1. Python may be paid more in data science and machine learning. 2. JavaScript has great demand in front-end and full-stack development, and its salary is also considerable. 3. Influencing factors include experience, geographical location, company size and specific skills.

Demystifying JavaScript: What It Does and Why It Matters Demystifying JavaScript: What It Does and Why It Matters Apr 09, 2025 am 12:07 AM

JavaScript is the cornerstone of modern web development, and its main functions include event-driven programming, dynamic content generation and asynchronous programming. 1) Event-driven programming allows web pages to change dynamically according to user operations. 2) Dynamic content generation allows page content to be adjusted according to conditions. 3) Asynchronous programming ensures that the user interface is not blocked. JavaScript is widely used in web interaction, single-page application and server-side development, greatly improving the flexibility of user experience and cross-platform development.

How to merge array elements with the same ID into one object using JavaScript? How to merge array elements with the same ID into one object using JavaScript? Apr 04, 2025 pm 05:09 PM

How to merge array elements with the same ID into one object in JavaScript? When processing data, we often encounter the need to have the same ID...

How to achieve parallax scrolling and element animation effects, like Shiseido's official website?
or:
How can we achieve the animation effect accompanied by page scrolling like Shiseido's official website? How to achieve parallax scrolling and element animation effects, like Shiseido's official website? or: How can we achieve the animation effect accompanied by page scrolling like Shiseido's official website? Apr 04, 2025 pm 05:36 PM

Discussion on the realization of parallax scrolling and element animation effects in this article will explore how to achieve similar to Shiseido official website (https://www.shiseido.co.jp/sb/wonderland/)...

The difference in console.log output result: Why are the two calls different? The difference in console.log output result: Why are the two calls different? Apr 04, 2025 pm 05:12 PM

In-depth discussion of the root causes of the difference in console.log output. This article will analyze the differences in the output results of console.log function in a piece of code and explain the reasons behind it. �...

How to implement panel drag and drop adjustment function similar to VSCode in front-end development? How to implement panel drag and drop adjustment function similar to VSCode in front-end development? Apr 04, 2025 pm 02:06 PM

Explore the implementation of panel drag and drop adjustment function similar to VSCode in the front-end. In front-end development, how to implement VSCode similar to VSCode...

Is JavaScript hard to learn? Is JavaScript hard to learn? Apr 03, 2025 am 12:20 AM

Learning JavaScript is not difficult, but it is challenging. 1) Understand basic concepts such as variables, data types, functions, etc. 2) Master asynchronous programming and implement it through event loops. 3) Use DOM operations and Promise to handle asynchronous requests. 4) Avoid common mistakes and use debugging techniques. 5) Optimize performance and follow best practices.

See all articles