Course tips and study guides

Study plans, exam and interview preparation, projects and placements, from people a year or two ahead and the UniCircle team. Every tip names its author and is checked by an editor before it appears.

Topics#javascript #html #java #sql #react #accessibility #dsa #interview #nodejs #arrays #error handling #forms #oop #placements #postgresql #abstract classes #acid #aggregates

2 tips tagged #react

TipEngineeringUndergraduateControlled and uncontrolled form inputs in ReactThe difference between inputs whose value lives in React state and inputs the browser manages, when to use each, and the warning you get when you mix them.#react#forms#controlled components#inputsUniCircle team1 min
TipEngineeringUndergraduateLists and keys in React: why the index is usually the wrong keyHow React uses keys to match list items between renders, what goes wrong with array indexes as keys, and how to pick a good key.#react#lists#keys#renderingUniCircle team1 min

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