JinJu’s road

Convert

myjinju@newsletter.paragraph.com (JinJu’s road) — Wed, 19 Jan 2022 12:08:28 GMT

 private static <T> T convert(ResultSet set, Class<T> clazz) {
        try {
            Constructor<T> constructor = clazz.getConstructor
                    (clazz.getConstructors()[0].getParameterTypes());
            Class<?>[] param = constructor.getParameterTypes();
            Object[] objects = new Object[param.length];
            for (int i = 0; i < param.length; i++) {
                objects[i] = set.getObject(i + 1);
                if (objects[i].getClass() != param[i]) {
                    throw new SQLException("错误类型转换");
                }
            }
            return constructor.newInstance(objects);
        } catch (ReflectiveOperationException | SQLException e) {
            e.printStackTrace();
            return null;
        }
    }

MyTinySTL Day one

myjinju@newsletter.paragraph.com (JinJu’s road) — Tue, 18 Jan 2022 03:44:11 GMT

C++原生 cstddef、ctime、cstring、new、iostream、initializer_list、stdexcept、cassert、cstdlib、climits、type_traits
第一层：exceptdef.h、functional.h、type_traits.h
第二层：iterator.h、util.h
第三层：algobase.h、construct.h、heap_algo.h、numeric.h、set_algo.h
第四层：allocator.h、uninitialized.h
第五层：memory.h
第六层 : algo.h、basic_string.h、deque.h、lish.h、rb_tree.h、vector.h
第七层：algorithm.h、astring.h、hashtable.h、map.h、queue.h、set.h、stack.h
第八层：unordered_map.h、unordered_set.h

Hello BlockChain

myjinju@newsletter.paragraph.com (JinJu’s road) — Sun, 16 Jan 2022 13:12:30 GMT

Just a test

#include<iostream>
using namespace std;
int main()
{
  cout<<"hello blockchain"<<endl;
  return 0;
}