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drag-and-drop's Introduction

Three versions of a simple drag-and-drop app.

Version 1: Store all positions in Mongo on every mouse move. Works, but updates are slow.

Version 2: Store all positions in a minimongo-backed in-memory databse. Fast, but restarting the server loses track of positions.

Version 3: A hybrid approach -- while dragging, store position in memory; on drop, store in Mongo.

See the three revisions at https://github.com/avital/drag-and-drop/commits/master

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