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    <blockquote> <p>I'm an experienced C++/.NET/Java Windows/Web programmer trying to learn (Common) Lisp. I'm reading Practical Common Lisp and using SLIME.</p> </blockquote> <p>One can also use the <a href="http://www.lispworks.com/downloads/" rel="nofollow">LispWorks Personal Edition</a> for learning Lisp. It has some limitations and the full product is commercial, but it is quite a bit easier to use.</p> <blockquote> <p>I get the REPL, but don't quite get how I can use it effectively. When I need to change a function I have to retype the defun and make changes (tedious and error prone). How can I do this better?</p> </blockquote> <p>The REPL has a history. With keyboard commands you can get back prior input and change it. Other than that just edit a Lisp file and compile code from there. In Lisp you can compile/eval individual expressions and definitions. Typical IDEs like SLIME, <a href="http://en.wikipedia.org/wiki/LispWorks" rel="nofollow">LispWorks</a> or <a href="http://en.wikipedia.org/wiki/Allegro_Common_Lisp" rel="nofollow">Allegro CL</a> allow you to run code also from normal Lisp text windows - additionally to executing expressions in the REPLA (aka Listener).</p> <blockquote> <p>How do I get from entering code at the REPL to actually having a program? I'm used to the C model where you have code files that you can review, edit and recompile. I know Lisp has something similar (via the load function), but how does one get a function I just defined and tested into a file to be saved? I'm hoping there's a better method than my current select+copy+paste.</p> </blockquote> <p>Copy and paste in one thing. But the correct way is to work from a text file in an editor window. One can compile/load expressions, the editor buffer or the associated file.</p> <blockquote> <p>How do you debug errors? Is there any ability to step into code like I would with other languages?</p> </blockquote> <p>See STEP, TRACE and related. SLIME, LispWorks and Allegro CL have lots of additional features.</p> <blockquote> <p>As long as the S-expression is valid, I don't get any errors when entering a (defun ...). It's not until I try to use it that I find out it's not valid. Is there any way to get errors sooner (i.e. compile the code)?</p> </blockquote> <p>For many cases one uses a compiler. The compiler will find a range of errors and also will note when something is unusual (for example a function does not exist or a variable has not been defined).</p> <p>-Is there some IDE that would be more familiar to me or allow me to play with the language easier?</p> <p>LispWorks, Allegro CL are the best under Windows. There are some alternatives like <a href="http://en.wikipedia.org/wiki/Corman_Common_Lisp" rel="nofollow">Corman Lisp</a> (I don't know it is maintained right now) or even Ufasoft Lisp.</p> <blockquote> <p>Should I switch to learning Scheme instead?</p> </blockquote> <p>Not really.</p>
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    1. POLearning Common Lisp tips for a Windows/C++ programmer
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    1. USPeter Mortensen
    1. USRainer Joswig
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