Coldwast wrote
Jun 24, 2026 in Programming, Concepts, Haskell - A higher-order function takes a function as an argument or returns one as its result. What higher-order functions are, why map, filter and fold are the classic examples, how they replace loops, and how they work in Haskell.
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Jun 23, 2026 in Programming, Concepts, Compiler - A compiler turns the source code you write into a program the machine can run. What a compiler is, how it works stage by stage (lexing, parsing, optimization, code generation), compiler vs interpreter, and where GHC fits for Haskell.
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Jun 22, 2026 in Programming, DevOps, Automation - CI/CD automates the path from a code change to a tested, deployed app. What continuous integration and delivery/deployment mean, how a pipeline works, the common tools, and why teams rely on it.
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Jun 22, 2026 in Programming, Servers, Security - SSH (Secure Shell) is the encrypted protocol you use to log in to and run commands on a remote server safely. How the handshake and keys work, passwords vs SSH keys, the everyday commands, and where you meet it.
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Jun 19, 2026 in Programming, Hosting, Infrastructure - A VPS is your own isolated slice of a physical server, with dedicated resources and full root access. How virtualization works, VPS vs shared/dedicated/cloud, managed vs unmanaged, and what you use one for.
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Jun 19, 2026 in Programming, DevOps, orchestration - Kubernetes is an open-source system that runs and coordinates containers across many machines - scheduling, scaling, healing and networking them. The core concepts (pod, node, cluster, deployment, service), how it relates to Docker, and when you actually need it.
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Jun 19, 2026 in Programming, DevOps, containers - Docker packages an application and everything it needs into a container that runs the same way on any machine. Containers vs virtual machines, the key concepts (image, container, Dockerfile, registry), and Docker vs Kubernetes.
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Jun 18, 2026 in Programming, Tools, Beginners - An IDE bundles a code editor, build tools, a debugger and version control into one app - so you write, run and fix code in one place. What it includes, IDE vs editor, and how to choose one.
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Jun 18, 2026 in Programming, Data, Databases - SQL databases store structured data in related tables with a fixed schema and strong consistency; NoSQL trades some of that for flexible schemas and horizontal scale. Consistency, scaling, querying, and when to choose each.
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Jun 18, 2026 in Programming, Web, APIs - REST uses HTTP + JSON (human-readable, universal); gRPC uses HTTP/2 + Protocol Buffers (fast, typed, streaming) for service-to-service calls. Performance, streaming, browser support, and when to pick each.
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Jun 17, 2026 in Programming, Web, APIs - REST and GraphQL are two ways to build a web API: REST uses many endpoints with fixed responses; GraphQL uses one endpoint where the client asks for exactly the fields it needs. Over/under-fetching, caching, and when to choose each.
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Jun 17, 2026 in Programming, Web, Concepts - A webhook is an automated HTTP request a service sends you when an event happens - the reverse of an API call you make. How webhooks differ from polling an API, how to receive one safely, and real examples (Stripe, GitHub, Slack).
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