SvyatoslavMC today at 11:54 AM

The dangers of using multi-character constants

• PVS-Studio corporate blog,
• C++,
• Visual Studio,
• Development for Windows

During code analysis, PVS-Studio analyzes the data flow and operates variable values. Values are taken from constants or derived from conditional expressions. We call them virtual values. Recently, we have refined them in order to work with multi-character constants and this has become the reason to create a new diagnostic rule.

Introduction

Multi-character-literals are implementation-defined, so different compilers can encode them in different ways. For example, GCC and Clang set a value, based on the order of the symbols in the literal, while MSVC moves them depending on the symbol's type (regular or escape).

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markus_saar today at 10:02 AM

How to save $58 in 5 minutes: let’s use different prices in each country against marketers

• Cloud services,
• Finance in IT,
• Lifehacks for geeks

Hello Habr! Now that is summer vacation season. Many of you will take a flight to a place far from your everyday routine at home. Before this hot vacation season starts, we should discuss an interesting and useful method on how to save money using a VPN.

One of the easiest ways to see the value in this is looking at car rentals while on vacation.

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How to speed up LZ4 decompression in ClickHouse?

• Яндекс corporate blog,
• High performance,
• Open source,
• C++,
• Big Data

When you run queries in ClickHouse, you might notice that the profiler often shows the LZ_decompress_fast function near the top. What is going on? This question had us wondering how to choose the best compression algorithm.

ClickHouse stores data in compressed form. When running queries, ClickHouse tries to do as little as possible, in order to conserve CPU resources. In many cases, all the potentially time-consuming computations are already well optimized, plus the user wrote a well thought-out query. Then all that's left to do is to perform decompression.



So why does LZ4 decompression becomes a bottleneck? LZ4 seems like an extremely light algorithm: the data decompression rate is usually from 1 to 3 GB/s per processor core, depending on the data. This is much faster than the typical disk subsystem. Moreover, we use all available CPU cores, and decompression scales linearly across all physical cores.

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doctorweb yesterday at 04:56 PM

EvilParcel vulnerabilities analysis

• Доктор Веб corporate blog,
• Antivirus protection,
• Java

turSystem yesterday at 11:28 AM

It's high time to become part of an open source project

• Open source,
• Node.JS,
• Angular,
• ReactJS,
• VueJS

Pavel_Ku yesterday at 09:36 AM

How RICE Scoring Model Enhances Product Feature Prioritization

• Hygger corporate blog,
• Development Management,
• Project management,
• Product Management

There are many ways to work out the order and privilege in which your product features should be brought to life. In fact, someone often tempts to go just with their gut. Feature scoring is a low-cost and convenient way to define the relative value of any number of things you may work on.

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WBOIT in OpenGL: transparency without sorting

• C++,
• Working with 3D-graphics

Andrey2008 June 24, 2019 at 10:01 AM

How to quickly check out interesting warnings given by the PVS-Studio analyzer for C and C++ code?

• PVS-Studio corporate blog,
• C++,
• C

Once in a while, programmers who start getting acquainted with the PVS-Studio code analyzer ask me: «Is there a list of warnings that accurately indicate errors?» There is no such list because uninteresting (false) warnings in one project are very important and useful in another one. However, one can definitely start digging into the analyzer from the most exciting warnings. Let's take a closer look at this topic.

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msgeek June 24, 2019 at 10:00 AM

A drawing bot for realizing everyday scenes and even stories

• Microsoft corporate blog,
• Open source,
• GitHub,
• Machine learning,
• Artificial Intelligence

derSmoll June 23, 2019 at 11:37 PM

Frontend Weekly Digest (17 – 23 June 2019)

• Website development,
• CSS,
• JavaScript,
• HTML

Larymar June 23, 2019 at 09:30 PM

AvaloniaUI features using the custom MessageBox

• Programming,
• .NET,
• C#,
• Development for Linux,
• Development for Windows

• Tutorial

Avalonia ui is a delightful framework to which you want to return again and again. So let's go back to it again and look at some of the features with my message box.

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agurnov June 23, 2019 at 07:10 PM

Key factors of a Successful Team Enablement

• Wrike corporate blog,
• Client optimization,
• SaaS / S+S

AlanDenton June 23, 2019 at 08:14 AM

SQL Index Manager – a long story about SQL Server, grave digging and index maintenance

• Programming,
• .NET,
• SQL,
• Microsoft SQL Server,
• Database Administration

Every now and then we create our own problems with our own hands… with our vision of the world… with our inaction… with our laziness… and with our fears. As a result, it seems to become very convenient to swim in the public flow of sewage patterns… because it is warm and fun, and the rest does not matter – we can smell round. But after a fail comes the realization of the simple truth – instead of generating an endless stream of causes, self-pity and self-justification, it is enough just to do what you consider the most important for yourself. This will be the starting point for your new reality.

For me, the written below is just such a starting point. The way is expected to be lingering…

Let's go?

Simple story behind Refresh and Access tokens

• API

Ronak_Patel June 20, 2019 at 04:54 PM

AngularJS vs. KnockoutJS: The Fundamental Differences and Similarities You Should Know

• JavaScript,
• Angular

It's extremely befuddling when it comes to choosing between two libraries and frameworks, especially when they are almost similar to each other.

I faced the same situation recently when I had to choose one from AngularJS vs KnockoutJS. The most perplexing part of the two is AngularJS is a JavaScript-based open-source front-end web development framework while Knockout is a library.

So, the selection is a bit complex task and, as I had to, you might need to go through a systematic and understand the two technologies or web development framework thoroughly.



So, you need to begin following the one-by-one method.

What is Framework?

A framework is a model on which you have to build your home. It is having a collection of blueprints which from which it choose the right one for you. In short, the framework is in charge of the flow and it chooses when and how to go.

What is the Library?

The library is like going to a furniture house to get some furniture for your home. Here you are in charge of the flow and you decide when to call the code.

Overview of Angular and KnockoutJS

AngularJS	KnockoutJS
Stable Release
Version 8.0.0 on / May 29, 2019	3.5.0 / February 22, 2019
Managed by
Google	Steve Anderson
Programming Language
JavaScript	JavaScript
Type
Web Framework	JavaScript Library
Routing
Angular Supports	Not Available
Testing
Protractor works as test framework	Not Available
Documentation
Well organized Documenations	Poor Documentation
GitHub Stars
59,555	9,526

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imjenniferatkin June 20, 2019 at 04:07 PM

Launching a taxi-hailing app in Tokyo: How Sony does it with S.Ride?

• Development of mobile applications,
• Start-up development,
• Software

Uber, as we know, operates only in 650 cities and remains the best among all taxi apps. But have you ever imagined about other cities and their demand for taxi applications? If you did, you would have certainly come across a few regional apps like Ola, Didi Chuxing, Japan Taxi, etc. These apps are focused on fulfilling the demands of locals; and in that way, they have succeeded and generated revenue tremendously. If you search for the reason behind the success of these apps, it inevitably ends up in the kind of service it provides its customers. So, it all depends on how well you bestow your service (whether you focus regionally or globally).

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msgeek June 20, 2019 at 10:00 AM

WSL 2 is now available in Windows Insiders

• Microsoft corporate blog,
• Configuring Linux,
• Development for Linux,
• Development for Windows

We’re excited to announce starting today you can try the Windows Subsystem for Linux 2 by installing Windows build 18917 in the Insider Fast ring! In this blog post we’ll cover how to get started, the new wsl.exe commands, and some important tips. Full documentation about WSL 2 is available on our docs page.

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Pavel_Ku June 20, 2019 at 09:13 AM

Introduction to ICE Scoring for Product Feature Prioritization

• Hygger corporate blog,
• Project management,
• Product Management,
• Personnel Management

It is difficult to imagine a situation when a product manager does not face prioritization challenges. Can you quickly decide what to place to the first place?

Any product timeline requires a clear order and only qualitatively decomposed and managed tasks will lead you to a decent and successful product release. In this case, you will not successfully perform without a powerful prioritization. Where to start and how to define the most appropriate prioritization method? Especially if you are a newcomer in the product management world? Here we describe the ICE scoring prioritization method that empowers product managers to choose the right features for development.

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ketanchavda June 19, 2019 at 06:02 PM

9 Ways to Fuel Up the Mobile App Developer’s Efficiency

• Development of mobile applications

• From sandbox

In general, the productivity of coding superheroes is measured by the number of lines of code and the quality of the code they write. It means, when the developer churns out the output compared to input, they are declared as productive. Presently, every company wants a productive programmer to accelerate time-to-market and enrich mobile app user’s experience that helps them stand ahead of the competitors.

Alas! All the developers are not productive. Most of them, pull their hairs when the deadline is around the corner, when finding the source of bugs seems a hard nut to crack in, or when the client is complaining about the features not meeting the business needs. The reason behind for not performing to the peak efficiency is they work hard, but not smartly.

The developer’s productivity can be augmented when they work prudently, make the most out of the time, and incorporate the best practices.

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BeyersJulia June 19, 2019 at 05:34 PM

M&A for Project Teams: How to Manage Project Data and Processes Effectively?

• Project management