"There are only two hard things in Computer Science: cache invalidation and naming things." In this lesson, we'll learn how to use variables to assign names to data. For example, the name "art ...

必ずと言っていいほどブチ当たって理解に苦しむものがあります。 それは「オブジェクト指向」というものです。 今回は説明しませんけど。 いや、現在進行形で説明中とも言えるかもしれません。 と言っても過言ではないです。 「オブジェクト指向」は ...

You have already written a “Hello, World!” program. As you can see, this isn’t very flexible—you provided the exact text you wanted to print. However, more often than not, we don’t know the values we ...

The following facilities allow the value of a variable (more specifically, the value associated with the current binding of the variable) to be altered. Such alteration is different from establishing ...