Many young people have unhealthy routines and habits. This post will introduce a reason why we should have healthy routines and habits. Read more

I have a good understanding of algorithms, data structures, logic, program verification, and Vim keybindings. Why am I not fast as I thought? Read more

I want to reopen my blog suddenly. Read more

You may be asked what’s the difference between new and malloc. In fact, they are completely different. However, in a sense, they are almost no difference. Read more

In C++11, you can initialize all members of a C-style array to zero. Read more

The modulo operator can be found in almost every programming language. However, the behavior of how they are defined depends on the language. Read more

Recently, I got stuck in the stack data structure. Everyone knows that the stack is a LIFO (Last In First Out) data structure. This is easy to understand, but not easy to use sometimes. Read more

题目 The Welfare Crook, 出自 “Science of Programming”: Suppose we have three long magnetic tapes, each containing a list of names in alphabetical order. The first list contains the names of people woring at IBM Yorktown, the second the names of students at Columbia University and the third the names of people on welfare in New York City. Practically speaking, all three lists are endless, so no upper Read more

模板特化和实例化有时挺让人迷惑. Read more

使用索引还是迭代器? 从 0 开始还是从 1 开始? 左闭右开还是左开右闭? 亦或是全闭/全开区间? 索引产生的微小错误让人混乱? (这也叫差一错误 (off-by-one error)). 如果你曾为这些问题困扰, 那么元素间索引的思想或许可以帮助你. Read more