list of programming languages
Rust’s Stream trait is the asynchronous counterpart of Iterator: where an iterator produces values synchronously on demand, a stream produces values over time, yielding Poll::Pending when no value is ready and waking the task when one arrives. This abstraction covers channels, network data, file chunks, and any source that emits items asynchronously. But streams alone…
A stored procedure without parameters is a fixed program. It does the same thing every time it runs, on the same data, and it can only be reused if the operation happens to be identical. Parameters change that. An input parameter passes a value into the procedure, so the same program serves a range of…
An assertion function is a function that validates a condition at runtime and, if the condition fails, throws an error. If the function returns normally, TypeScript knows the condition was true and narrows the type of the relevant variable for the remainder of the scope . The asserts keyword in the return type is what…
Dart’s cryptographic ecosystem splits along a clean line: hashing and encryption are different operations with different packages, and confusing them produces insecure code. The crypto package provides one-way hash functions—SHA-256, HMAC—that cannot be reversed. The encrypt package provides two-way symmetric encryption built on PointyCastle, primarily AES with PKCS7 padding . Neither package is a complete…
CLI & Runtime Flags Flag Purpose node file.js Run a script node -e “code” Evaluate inline code node –watch file.js Auto-restart on change node –env-file=.env app.js Load env file natively node –inspect app.js Start inspector on :9229 node –inspect-brk app.js Break on first line node –prof app.js Generate V8 CPU profile node –prof-process isolate-*.log Read…
Rust’s two dominant web frameworks approach the same problem from opposite architectural directions. actix-web inherits the actor model from its actix runtime: each worker is a single-threaded Tokio runtime pinned to a thread, tasks stay on their worker, and communication happens through typed messages . axum is built directly on Tokio and the Tower ecosystem:…
SQL is a declarative language. A query says what it wants, not how to compute it. Procedural SQL adds the “how” back: variables, conditionals, loops, and exception handling. The procedural extensions differ by database. PostgreSQL has PL/pgSQL. SQL Server has T-SQL. MySQL has its own stored program language. Oracle has PL/SQL. The syntax differs, but…
The satisfies operator, introduced in TypeScript 4.9, solves a long-standing dilemma: you want to validate that a value conforms to a type, but you don’t want to lose the specific type that TypeScript would infer on its own. Before satisfies, you had two imperfect choices. You could use a type annotation (: SomeType), which validates…
Dart has no eval function. The language compiles ahead of time, and the runtime does not include a mechanism to parse and execute arbitrary Dart source from a string. The Stack Overflow revision citing a Dart team member is direct: “Dart will never have eval” . This is a deliberate design decision, not an omission….
Rust’s database story splits along a single axis: whether the SQL is written by hand or generated by a type-safe DSL. sqlx is a SQL toolkit—you write the query, and the macro sqlx::query! checks it against a live database (or a cached schema) at compile time, verifying column names and types without generating any query…