You can control the concatenation results using SQL ServerCONCAT_NULL_YIELDS_NULL(T-SQL). Depending upon the CONCAT_NULL_YIELDS_NULL settings, the concatenation results are treated as null or empty string values. When SET CONCAT_NULL_YIELDS_NULL is ON,
The compiler reports an error if you try to compile a piece of code like the one follows: int x = 9;switch(x){ case 1: int i = 0; break; case
Sprinkling TRACE statements in your code is a common practice during development and debugging, especially when refereshing UI code, or multi-threading, etc.Usually, people write something like this: TRACE(“My Trace “);
Conditional typedef declarations can be useful in cross-platform development. For example, some platforms define long as a 32-bit integer. Other platforms treat long as a 64-bit integer. You can create
As strange as it may seem, C++ doesn’t allow you to re-open a namespace using a qualified name; you can re-open it only by using its nested name. For example,