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Technical review: Building Data Visualizations with D3 and Angular 2
Most underrated answer: https://stackoverflow.com/questions/35229576/d3js-force-layout-line-with-gradient-between-nodes/37651927#37651927 (if you iterate the fiddle-id it gets better :P)
Traversing an observable linked list: https://stackoverflow.com/questions/67487848/traversing-sequential-api-calls/67494088#67494088