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React Custom Hook: useClickOutside

Level of difficulty Medium
Reading time 2 min
Views 1.5K
Digest

The potential applications for useClickOutside are endless. It is particularly useful when implementing modal windows, dropdown menus, or any element that should be closed when a user interacts with anything outside of it. By incorporating useClickOutside, you can enhance the user experience by providing intuitive and efficient interactions.

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Rating 0
Comments 3

Referential Transparency as a mechanism for building Reliable Programs

Level of difficulty Easy
Reading time 4 min
Views 250

Referential transparency, a key concept in functional programming, is often associated with more reliable, easier to test, and safer software. This term refers to a principle in which a function, given the same input, will always produce the same output without producing any side effects.

In the real world of software development, side effects are inevitable. Programs are rarely useful unless they interact with the outside world. This interaction could be reading from or writing to the console, making network requests, querying a database, or modifying a variable.

Yet, despite the necessity of side effects, they introduce risks and complexities. Programs with side effects are harder to test, harder to reason about, and more prone to bugs. They can also make the system as a whole more difficult to understand and maintain, due to hidden dependencies between components.

Enter referential transparency - a concept that means a function, given the same input, will always provide the same output, without creating any side effects. A function that adheres to this principle doesn't read any global state or change any state outside of its scope. The result is code that is more predictable and easier to reason about.

In terms of software safety and reliability, the absence of side effects is not enough. Programs should also be free from external influence - their results should only depend on their arguments. That is, programs should not read data from the console, a file, network, database, or even system variables.

Yes
Total votes 1: ↑1 and ↓0 +1
Comments 3

In simple terms about a simple Nginx Unit

Level of difficulty Easy
Reading time 8 min
Views 572
Review
Translation

This article describes the new Nginx Unit web server. In it you can learn more about the web server itself, its installation and configuration: how to use listeners, routing, how to install TLS certificates. The article will show how easy it is to work with it and that huge configs are slowly becoming a thing of the past.

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Rating 0
Comments 1

React Custom Hook: useArray

Level of difficulty Medium
Reading time 2 min
Views 5.1K
Digest

In this article series, we embark on a journey through the realm of custom React hooks, discovering their immense potential for elevating your development projects. Our focus today is on the "useArray" hook, one of the many carefully crafted hooks available in the collection of React custom hooks.

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More powerful and intelligent task scheduling framework — Openjob 1.0.6 published

Reading time 3 min
Views 897

Openjob is a new  distributed task scheduling framework based on Akka architecture. Supports multiple cronjob, delay task, workflow, lightweight distributed computing, unlimited horizontal scaling, with high scalability and fault tolerance. Also has complete management, powerful alarm monitoring, and support multiple languages

If you are looking for a high-performance distributed task scheduling framework that supports cronjob, delay task, lightweight computing, workflow, and supports multiple programming languages, then Openjob is definitely the way to go.

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Redefining the VOD OTT Experience in 2023: A Glimpse into the Future of Digital Entertainment

Reading time 3 min
Views 204

In the rapidly evolving landscape of digital entertainment, the year 2023 has witnessed a profound transformation in Video On Demand (VOD) Over-The-Top (OTT) platforms. These platforms have redefined how audiences access and consume content, introducing cutting-edge technologies and innovative features that have revolutionized the entertainment industry.

Embracing Augmented Reality (AR) and Virtual Reality (VR)

In 2023, VOD OTT platforms have embraced AR and VR technologies to provide viewers with immersive and interactive experiences. Users can now step into virtual worlds, interact with characters, and actively participate in the content they are watching, transcending the boundaries of traditional passive viewing.

Imagine exploring an ancient civilization through the eyes of a protagonist, feeling the thrill of an adrenaline-pumping car chase, or even interacting with virtual avatars of celebrities and influencers. The integration of AR and VR into VOD OTT platforms has ushered in a new era of interactive and experiential entertainment.

Personalization: The Heart of the VOD Experience

Powered by advanced artificial intelligence (AI), VOD OTT platforms have taken personalization to new heights. By analyzing user behavior, preferences, and viewing habits, these platforms deliver tailor-made content recommendations, ensuring that viewers find exactly what they love without extensive searching.

This level of personalization ensures that users are presented with content that resonates with their tastes, creating a seamless and enjoyable content discovery experience. By removing the need for extensive searching, VOD OTT platforms have become the go-to destination for viewers seeking highly relevant and engaging content.

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Total votes 4: ↑4 and ↓0 +4
Comments 1

LeetCode 2532 (Hard++, Extra Category, Amazon). Time to Cross a Bridge. Swift solution

Level of difficulty Hard
Reading time 5 min
Views 824
Case

Hard++, Extra Category.

Amazon.

Overflow checks have been taken into consideration. The maximum time to move a box is at most 4 * 1000 (four steps to move the box, each taking 1000 time). With at most 1e4 boxes, the total time is at most 4e7, ensuring the solution is safe.

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How to access real-time smart contract data from Python code (using Lido contract as an example)

Level of difficulty Medium
Reading time 7 min
Views 510
Tutorial

Let’s imagine you need access to the real-time data of some smart contracts on Ethereum (or Polygon, BSC, etc.) like Uniswap or even PEPE coin to analyze its data using the standard data scientist/analyst tools: Python, Pandas, Matplotlib, etc. In this tutorial, I’ll show you more sophisticated data access tools that are more like a surgical scalpel (The Graph subgraphs) than a well-known Swiss knife (RPC node access) or hammer (ready-to-use APIs). I hope my metaphors don’t scare you 😅.

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Total votes 1: ↑1 and ↓0 +1
Comments 1

Modular grids in UX designer's work

Level of difficulty Easy
Reading time 8 min
Views 638

Most novice web designers at the beginning of their journey still in the courses hear such a concept as modular grid, and wonder what it is and how to properly customize and use this tool.

From personal experience, I know that in many courses with titles "web designer from zero to pro" or " IU / UX designer in a month" this topic is either skipped, or give instructions, where they say everywhere to use a grid of 12 columns with margins of 80 to 100 pixels. And, as a result, it turns out that after taking these gore courses, a person sees beautiful works, thinks to repeat them, but the grid does not work, and the student, simply, does the work without a grid and completely forgets about it.

That's why I want to help beginners to understand this really voluminous issue.

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Rating 0
Comments 1

iOS Dev Skills. Performance Review

Reading time 2 min
Views 533
Digest

CTO: Balancing Leadership and Architecture.

As a CTO, effective leadership goes beyond technical architecture. Conducting regular performance reviews is a crucial part of managing teams.

Note: The performance review schedule may vary depending on the specific
company's policies and guidelines.

For early-stage startups, lacking CTO expertise in conducting performance reviews is common. In my experience, I've tailored grades to encompass all aspects of professional iOS development, keeping project-specific needs in mind. Being the first in the team can offer significant growth opportunities. However, acknowledging any lack of people management skills and compensating through continuous growth is essential.

I've compiled my insights on structuring the iOS development department, conducting performance reviews, and most importantly, emphasizing the significant distinctions between developers' levels based on well-defined criteria.

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LeetCode 2801 (Hard, Acceptance 14.5%). Count Stepping Numbers in Range. DP. Handles large inputs (10^9 + 7)

Level of difficulty Medium
Reading time 3 min
Views 452
Case

Given two positive integers low and high represented as strings, find the count of stepping numbers in the inclusive range [low, high].

A stepping number is an integer such that all of its adjacent digits have an absolute difference of exactly 1.

Return an integer denoting the count of stepping numbers in the inclusive range [low, high].

Since the answer may be very large, return it modulo 10^9 + 7.

Hard, Acceptance Level 14.5%.
Dynamic Programming (DP).
Efficiently handles large inputs (10^9 + 7).

Latest and Most Hardest Problem.

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How to partition a MySQL table

Reading time 6 min
Views 745

Alright, folks! Get ready to dive into the world of MySQL table partitioning. In this guide, we'll cover why partitioning is so darn important for your MySQL tables. Plus, we'll dish out all the juicy benefits you can expect from partitioning a table. So, buckle up, and let's get started!

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Comments 2

Wie ich ein einfaches Monitoring von Kanälen mit Benachrichtigungen an Slack ohne Erfahrung gemacht habe

Level of difficulty Easy
Reading time 3 min
Views 344
Tutorial

Arbeiten im technischen Support brachte zusätzlich zu allen Aufgaben die Pflicht mit sich, die Kommunikationskanäle zu überwachen. Dies wurde über den Grafana-Dienst realisiert, der die erforderlichen Metriken aus Zabbix bezog. Da die Art der Arbeit jedoch bedeutete, dass man nicht immer an seinem Arbeitsplatz sitzt, kam mir die Idee, dies ein wenig zu automatisieren und Benachrichtigungen auf das Telefon oder zum Beispiel in einen Messenger zu erhalten, falls ein Kommunikationskanal ausfällt. Allerdings hatte ich keinen Zugriff auf das Zabbix-System und auch keinen erweiterten Zugriff auf Grafana.

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Total votes 5: ↑5 and ↓0 +5
Comments 0

6 Best Flutter Development Companies in the US 2023

Level of difficulty Easy
Reading time 7 min
Views 948
Review
Understanding the world of Flutter app development can be a challenging endeavor, especially for business executives seeking to create top-notch mobile applications. When it comes to choosing a Flutter development company in the US, finding a reliable and proficient partner is crucial for the success of your app. A wrong choice could result in wasted resources and a subpar app that fails to meet user expectations.

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Total votes 3: ↑1 and ↓2 -1
Comments 1

LeetCode 2790 (Hard). Maximum Number of Groups With Increasing Length. Solution of the day. O(N logN). Math

Level of difficulty Medium
Reading time 3 min
Views 1K
Case

Simple Swift Math Solution.

Time complexity: O(N logN).

The time complexity of this solution is dominated by the sorting step, making it O(N logN), where N is the length of the input array usageLimits. The rest of the operations involve simple arithmetic and comparisons, which take linear time. Therefore, the overall time complexity of the function is O(NlogN).

Only 10 lines of code.

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DAOs trends in 2023 — or why DAOs can become the leading one in web3

Level of difficulty Easy
Reading time 3 min
Views 412
Analytics

Against the backdrop of a sharp decline in venture investments in various traditional industries (this is clearly related to the global economic situation), but against the backdrop of certain upheavals in the crypto industry, the question arises of a driver that can become one of the «pillars» of the development of a decentralized industry.

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Blockchain use in marketplaces — and how Account Abstraction can help it

Level of difficulty Easy
Reading time 3 min
Views 298
Analytics

Today, it becomes quite obvious that the situation with web3 technology is becoming similar to the situation with programmatic advertising 10-12 years ago. When programmatic-ads just started, the major market players were not very optimistic - it was much easier for them to follow the well-known paths with chains of publishers and agencies. However, once programmatic got rid of the «childhood diseases» and became simple in use, effective in attracting customers, it has taken a dominant position in the modern advertising market - providing precise targeting and cost reduction. The situation with web3 is similar - all publishers ideally want to have systems for lifetime tracking of customer achievements (that is, Soul Bound tokens in web3), theoretically stable decentralized data storage systems that cannot be broken through a simple server attack, real users’ ownership for his content, as well as simple cross-border payment systems that have built-in algorithms for calculating all duties and taxes. Sounds like a perfect world, but even Amazon doesn't do that yet. Why?

The problem is the web3 entry point, which is difficult for users. As soon as they start talking about opening a crypto wallet, about 12 phrases as a backup, most users interrupt the onboarding process and immediately leave the site. This is obvious - over the decades of the development of the digital market, users have become accustomed to facilitating and simplifying systems for interacting with the site. One-click registration, effective convenient UI, visibility and the «metro principle», where the client is led by the hand – this is modern digital progress. And here some 12 phrases are offered, incomprehensible tokens - and, most importantly, why? So, it turns out that a self-sufficient audience of geeks or really advanced users revolves around web3, which is growing weakly.

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