Rror: failed to init transaction (unable to lock database) error: could not lock database: File exists if you're sure a package manager is not already running, you can remove /var/lib/pacman/db.lck

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  Typescript blob to base64

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  How to return a new string with its first and last characters swapped

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  Warning: Can't perform a React state update on an unmounted component. This is a no-op, but it indicates a memory leak in your application. To fix, cancel all subscriptions and asynchronous tasks in a useEffect cleanup function.

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  Firebase: Firebase App named '[DEFAULT]' already exists (app/duplicate-app).

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  Ignoring header x-firebase-locale because its value was null. flutter

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  Error: The method assertThat(T, Matcher<? super T>) in the type MatcherAssert is not applicable for the arguments (List<String>, Matcher<Iterable<Integer>>)

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  ReferenceError: fetch is not defined

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  Typescript webpack node

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  How to link to page elements html

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  What are the components of the environment? Explain it along with the examples.

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