When you write code, you have a local context - business logic, algorithm, variables/parameters and their types. If you need to call some function, there is a narrower local context too - what you need to pass as parameters and what you'll get back. If you only writing code, often you need to take a look at function declaration to figure out what needs to be passed and what it will return. If return type is inferred, you have to look inside the function code to figure out the return type. The same happens when one reads the code (especially outside the IDE). Need to look inside the code to figure out something is a clear sign that part of context is lost. And lost context is a source of distraction and increased mental overhead. Brevity is good as long as it doesn't loss context.
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When you write code, you have a local context - business logic, algorithm, variables/parameters and their types. If you need to call some function, there is a narrower local context too - what you need to pass as parameters and what you'll get back. If you only writing code, often you need to take a look at function declaration to figure out what needs to be passed and what it will return. If return type is inferred, you have to look inside the function code to figure out the return type. The same happens when one reads the code (especially outside the IDE). Need to look inside the code to figure out something is a clear sign that part of context is lost. And lost context is a source of distraction and increased mental overhead. Brevity is good as long as it doesn't loss context.