Topological sort produces a linear ordering of a directed acyclic graph so that every directed edge goes from earlier to later in the order. It resolves dependencies such as build steps, course prerequisites, and task scheduling.
Topological sort - Interview Concepts - ExtraBrain is part of ExtraBrain's local-first Mac workflow for live interviews, meetings, transcription, provider control, and responsible AI use.
Topological sort produces a linear ordering of a directed acyclic graph so that every directed edge goes from earlier to later in the order. It resolves dependencies such as build steps, course prerequisites, and task scheduling.
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Repeatedly remove nodes with no remaining incoming edges, using in-degree counts and a queue.
Run depth-first search and push each node onto a stack after visiting its descendants, then reverse the stack.
If no valid ordering exists, the graph has a cycle, so topological sort also detects cycles.
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Only on a directed acyclic graph; if the graph has a cycle, no valid ordering exists.
Build systems, course scheduling, task ordering, and general dependency resolution.
