1. Addresses on 64 and 32 OS are different, so you have to be careful when your program have to deal with address. For example, if you take the difference of two pointers/iterators, you should type std::ptrdiff_t (which is essentially a singed integer type). Using an arbitrary integer type …

I have switched to the "Share Everything" plan of Verizon two weeks ago, and I got a little complex bill this month due to people leaving and joining my family plan. My ruby program for parsing phone bill still works well. It is actually surprising smarter than I thought on …

1. auto s = "abcd" creats const char * not string, so use auto with caution.

2. Since a string in C++ is an array of chars, you can operate it like an array. For example, you can use range-based for loop and so on.

3. It is recommended that you use std::string in …

One thing I do not like R is that operations on String in R are not as convenient as in other programming langauges such as Java, Python and Ruby. In these 3 programming languages, you can simply use + to concatenate strings while in R you have to use the function …

R is a language that is friendly to vector operation, so vector is an important data structure in R. A single data (of basic types, e.g., numeric or character) is essentially a vector of length 1. A matrix or an array in R is essentially a vector. R make …

About String Functions

1. The uniform random variables generated by VB is pretty good. At least it's acceptable according to the test in R.

2. String functions that return a string can be used with a dollar sign at the end, which is a faster version of the corresponding function.

3. The function …