Chain — 2 Technical Articles

Jul 21, 2025 · Artificial Intelligence

Mastering LangChain Chains: Simple, Composite, and Custom Nodes with LCEL

This tutorial walks through LangChain's core concept of Chains, demonstrating how to build simple, composite, and custom node chains, use prompt templates and structured output parsers, and leverage the LCEL syntax for clean, modular LLM applications.

ChainLCELLangChain

0 likes · 14 min read

Mastering LangChain Chains: Simple, Composite, and Custom Nodes with LCEL

vivo Internet Technology

Apr 15, 2020 · Frontend Development

How to Build Real Promise Chains: From Basics to Full Implementation

This article walks through the step‑by‑step creation of a JavaScript Promise implementation, explains why true chaining requires returning a new Promise from then, demonstrates mock asynchronous calls, and provides detailed code examples and execution logs to illustrate the complete chain behavior.

AsyncChainImplementation

0 likes · 13 min read

How to Build Real Promise Chains: From Basics to Full Implementation