parenscript-devel January 2013

parenscript-devel@common-lisp.net

6 participants
15 discussions

[parenscript-devel] Loops that return a value
by David Sargeant 17 Jan '13

17 Jan '13

It seems that the looping constructs don't currently return a value. In other words, they don't return an array of the results. CoffeeScript allows for both scenarios, that is, looping for side-effects and looping that returns an array of results. I'm thinking it would be very useful to have dotimes*, dolist*, for-in*, etc. that return an array of results. Below is an example from coffeescript.org. Let me know what you think. David countdown = (num for num in [10..1]) ------------------------------------ var countdown, num; countdown = (function() { var _i, _results; _results = []; for (num = _i = 10; _i >= 1; num = --_i) { _results.push(num); } return _results; })();

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Re: [parenscript-devel] Loops that return a value
by David Sargeant 15 Jan '13

15 Jan '13

Holy cow. You lispers are awesome. The bind* solution to my problem is very elegant. Thanks so much for showing this to me. Parenscript is one of the coolest things I've come across in a while. David

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Re: [parenscript-devel] Loops that return a value
by David Sargeant 15 Jan '13

15 Jan '13

Thanks for sharing that. What about looping over arrays and objects? David

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[parenscript-devel] Importing ParenScript Macros
by David Sargeant 12 Jan '13

12 Jan '13

I'm new to Common Lisp and ParenScript, so please forgive my questions if they are obvious. 1. What is the best way to import a file of ParenScript macros so that the macro calls in the file I'm compiling can be properly expanded? 2. Is there some way to watch a directory for changes to *.lisp files, and automatically compile to *.js files? Thanks for the help, David

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[parenscript-devel] error using parenscript 2.5
by Canhua 07 Jan '13

07 Jan '13

hi, I am using quicklisp to load parenscript 2.5, and encounter the following error: Error while invoking #<compile-op (:verbose nil) {1008483323}> on #<cl-source-file "parenscript" "src" "lib" "ps-loop"> [Condition of type asdf:compile-error] What does it mean ? Thanks

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parenscript-devel January 2013