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THE DAILY INDEX

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ARTICLES & TUTORIALS

TLDR Web Dev

SNEAKY REACT MEMORY LEAKS: HOW USECALLBACK AND CLOSURES CAN BITE YOU

Closures combined with the useCallback hook in React can cause hidden memory leaks by holding onto large objects in the component's context, preventing garbage collection. Memoized functions may inadvertently reference each other and shared data, creating an endless chain of closures. To avoid such issues, keep closure scopes small, avoid unnecessary memoization, and consider using useRef for large objects.

WHAT WOULD IT TAKE TO RECREATE BELL LABS?

Bell Labs was a highly successful industrial research lab that made numerous groundbreaking inventions and discoveries in the 20th century. Its success was due to several factors, including being a subsidiary of AT&T, a government-sanctioned monopoly, which allowed for long-term research projects and a broad research scope. The lab also benefited from historical circumstances like the advancement of quantum mechanics and the influx of talented European physicists after WWII. However, the lab's decline began after the breakup of AT&T in 1982, as it was repeatedly reorganized and faced increasing financial pressure.

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