#Programming (Програмування)
163 posts in category «Programming (Програмування)»
Notes on programming in Ukrainian: coding languages, algorithms, the latest technologies and other useful information for developers.
Why does PostgreSQL skip IDs when saving new records? (Heroku)
Why does PostgreSQL skip IDs when saving new records? (Heroku). Explanation of the reason for gaps in ID sequences.
Pessimistic Lock in Rails: what it is and when to use it. What are the alternatives?
Learn how to use pessimistic lock in Rails to protect against concurrent record changes. We compare it with optimistic locking an…
Embedded programming: what it is and how to get started
Embedded programming is the development of software for resource-constrained devices: microcontrollers, IoT systems, industrial a…
What is XOR and how does it work?
XOR (exclusive OR) is a logical operation used in encryption, bit manipulation, and difference checking. If the values are the sa…
What is CFB (Cipher Feedback)?
CFB (Cipher Feedback) is an encryption mode where each block depends on the previous one, providing data protection. It is used i…
What is debounce in JavaScript and why is it important?
Debounce in JavaScript is a technique that limits the frequency of function calls to avoid unnecessary load on the browser or ser…
What is Memoization (examples in Ruby and Ruby on Rails)?
Memoization is an optimization technique that caches the results of a function to avoid repeated calculations. In Ruby and Rails,…
What is a Promise in JavaScript and how to quickly understand its essence?
What is a Promise in JavaScript and how to quickly understand its essence? Let's analyze a couple of examples of promises that wi…
Fix the error [DEPRECATION] #adapters is deprecated. Use #profiles instead. (Codecov / docile)
Fix the error [DEPRECATION] #adapters is deprecated. Use #profiles instead. (Codecov / docile)
[Fix] Heroku / SearchBox addon - indexing error "The client is unable to verify that the server is Elasticsearch"
[Fix] Heroku / SearchBox addon - indexing error "The client is unable to verify that the server is Elasticsearch". Installing the…
