This chapter should have firmed up some of the ideas about objects and messages that were introduced in the previous chapter. Now you have learned about:
|•||The Playground sample application |
|•||Creating new objects using a #new message |
|•||Creating a Playground window |
|•||Adding shapes to a Playground |
|•||Manipulating and querying Playground shapes |
|•||Using the Package Browser to install a new package into your Dolphin image |
In subsequent chapters we will reuse the Playground application to illustrate some more features of the Smalltalk language. For now, tidy up by closing your existing Playground and workspace.