New posts in Language Design

Why did the Mathematica Language choose term rewriting instead of the Lambda Calculus as its basis?

Why is IdentityMatrix not defined as a SparseArray by default?

Second argument of BeginPackage with nested package loading

ToExpression and ToBoxes aren't inverses of each other?

Version inconsistency with optional arguments: what if the default value doesn't match the pattern?

Unexpected behaviour when pattern matching with Longest

Why did Mathematica choose brackets for function arguments over parentheses?

Why does Mathematica order polynomial forms in reverse from traditional order?

Why is there no PositionFunction in Mathematica?

Why round to even integers?