Mapeach

Many times when using mapcar, I find myself using a complex lambda expression for the function argument. This makes the code difficult to read since it breaks apart the flow. My code winds up looking like the following:

First … Read the rest

Once-only

One of the most common mistakes made when writing macros is evaluating one of the arguments multiple times. Not only can this be inefficient, but when side effects are involved, it leads to quirky behavior. Take a macro square, … Read the rest