TAILIEUCHUNG - HandBooks Professional Java-C-Scrip-SQL part 90

Tham khảo tài liệu 'handbooks professional java-c-scrip-sql part 90', công nghệ thông tin, kỹ thuật lập trình phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | The most interesting part is where the exception is thrown. throw_exception bind constructor some_exception constant Somewhere something went terribly wrong. The argument to throw_exception is a lambda expression. In this case it is created by binding a call to the some_exception constructor to which we pass the what argument a string literal. That s all there is to exception handling in . As always remember to treat these tools with care and respect as they can make life easier or harder depending on how well and judiciously you utilize Throwing and handling exceptions should not be common in your lambda expressions but it s necessary and reasonable from time to time. 10 Beware the tendency to fulfill the old adage When all you have is a hammer everything looks like a nail. Lambda Summary Use Lambda when You would otherwise create a simple function object You need to tweak argument order or arity for function calls You want to create standard-conforming function objects on-the-fly You need flexible and readable predicates The preceding reasons are just some of the cases where using this library makes perfect sense. Although the most common uses arise together with Standard Library algorithms that s at least in part due to the fact that such designs still aren t very common in other libraries the Boost libraries notwithstanding . Although the notion of algorithmic configuration through function objects needs no further proof of its usefulness there is a long way to go before we reach conclusive insights into what domains clearly can benefit from such designs. Just by thinking about potential uses of this library is a sure way to improve your current designs. is one of my favorite libraries mainly because it offers so much accessible functionality that isn t otherwise provided by the language. As the STL made its way into the hearts of programmers all over the world there was still something missing. To work efficiently with the .

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