list of programming languages
A table is created once and lives for years. The data inside it changes constantly, but the structure — the columns, the data types, the constraints — is not permanent. Requirements change. A new column is needed. A data type was chosen poorly. A constraint must be added to prevent invalid data. The ALTER TABLE…
Object types are how TypeScript describes structured data — records, entities, configuration, API responses, component props. Almost every non-trivial type in a real codebase is an object type, and almost every object type has at least one field that might be missing. That’s where optional properties come in: the ? modifier, the interaction with undefined,…
These CSS properties control the handling of whitespace, add emphasis marks to text, and create shadow effects for enhanced typography. Overview of Properties Property Description Common Values white-space Controls whitespace handling and wrapping normal, nowrap, pre, pre-wrap, pre-line text-emphasis Adds emphasis marks (shorthand for style + color) fill, before “•”, filled double-circle #ffb703 text-shadow Adds…
Dart 3 transformed the switch statement from a simple multi-way branch into a full pattern-matching construct. The old switch compared a value against constant cases. The new switch matches against patterns—which can be constants, types, collections, records, and objects—and can destructure the matched value in the process. This is not an incremental improvement. It is…
Modern web development requires handling different screen sizes, resolutions, and device capabilities. The <picture> and <source> elements provide a responsive solution, while favicons help with brand recognition in browsers. The Picture Element <picture> and Source Element <source> The <picture> element allows you to provide multiple versions of an image, and the browser automatically selects the…
Functions are blocks of code designed to perform a specific task. They play a crucial role in organizing and structuring code — allowing you to write reusable, maintainable, and modular programs. A Quick Look at the Examples a. Functions Introduction Functions are blocks of code designed to perform a specific task. They can be defined…
The call stack, microtask queue, and macrotask queue form the foundational memory and scheduling model that Node.js uses to execute JavaScript. Every function call creates a stack frame, every asynchronous callback is scheduled on one of the queues, and the event loop coordinates between them. Understanding these three components explains why process.nextTick runs before promises,…
Rust provides three loop constructs: loop, while, and for. Each serves a different purpose, and the choice among them is not arbitrary. loop repeats forever until an explicit break exits, and it can return a value from the break. while repeats as long as a condition is true. for iterates over the elements of an…
A table that is no longer needed should be removed. A table that is still needed but whose data should be cleared should be emptied. These are two different operations with two different consequences. DROP TABLE removes the table and everything in it, including the table’s definition. TRUNCATE TABLE removes all rows but keeps the…
TypeScript gives you two ways to put a type on something: inference — the compiler figures it out from the value — and annotation — you write it explicitly. Both are essential. Inference is why TypeScript feels light compared to Java or C#; annotations are why it’s precise when it needs to be. Knowing when…