2010年5月26日 · Using Smalltalk as a prototyping tool is where my interest lies: I think that given a new problem, different approaches to solving it can be tried and validated very quickly and easily in a Smalltalk environment, and once the desired solution is found it should be relatively mechanical to convert it to Java/C++/C# etc. etc.

2013年8月16日 · Correctly writing the instantiation and initialization code of complex object hierarchies is tricky in Smalltalk. What is more, the default initialization logic as implemented in Object is different across different Smalltalk dialects (i.e. Pharo decided to introduce a default initializer, making things worse).

2016年1月11日 · Note however that there are better ways to store structured data in files, e.g. STON (Smalltalk Object Notation, Smalltalk version of JSON) or XML. If you want to persist objects than you might want to checkout Fuel , StOMP (probably no longer supported) or any of the other object serializers.

2011年5月11日 · In Smalltalk, booleans (ie, True or False) are objects: specifically, they're instantiations of the abstract base class Boolean, or rather of its two subclasses True and False. So every boolean has type True or False, and no actual member data. Bool has two virtual functions, ifTrue: and ifFalse:, which take as their argument a block of code.

2021年9月14日 · Welcome to Smalltalk! You are asking a good question that points out some subtle differences in expressions that are outside or inside blocks. The '&' message is a "binary" message so takes only one argument. In this case the argument is expected to be a Boolean or an expression that evaluates to a Boolean.

2021年9月21日 · Everything. Smalltalk is Turing-complete and "Tetris-complete". It can be used for anything and everything any other language can be used for. Things that have been built in Smalltalk: Operating Systems; VMs (including Smalltalk VMs) Compilers (including Smalltalk compilers) Smalltalk IDEs (in fact, Smalltalk invented the concept of the IDE ...

2012年12月9日 · I agree with Igor. Moreover, "nicest and most elegant" is in the eye of the beholder. What isInteger and friends do is definitely faster as they are a single message send that immediately returns true/false versus isKindOf: which has to loop up the class hierarchy.

2012年11月28日 · The problem of many Smalltalk beginners is that they think of ifXXX: as syntax, where it is actually a message send which generates value. Also, the semi is not a statement separator as in many previously learned languages, but a sequencing message send construct.

2013年12月16日 · I've tried the code |myNum| myNum := SmallInteger new: 0. Transcript show: (myNum printString). , but Pharo crashes upon running this code.

2014年12月10日 · In Smalltalk class is an object itself, so self methodName in a class method sends message to self i.e. class object. This is good also to maintain consistency during inheritance. Imagine that you have SuperClass and SubClass .