Function Currying

What pattern does this code implement?

const logLevel = (level) => (message) => {
  console.log(`[${level}] ${message}`);
};

const logInfo = logLevel('INFO');
const logError = logLevel('ERROR');

logInfo('User logged in');
logError('Failed to connect to database');

Factory pattern
Singleton pattern
Observer pattern
Curried logger pattern
This code implements a 'Curried logger pattern'. The `logLevel` function is curried to take a log level first and return a specialized logger function that only needs a message. This creates a family of logging functions, each preconfigured with a specific log level. Here, we create `logInfo` and `logError` functions that add the appropriate level prefix to their messages. This pattern is useful when you need multiple variations of a function with some parameters fixed. It demonstrates how currying can create a clean API for related functionality, allowing consumers to choose the appropriate specialized function for their needs without repeating the log level each time.

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