Hi, I am a beginer at this.
Im writing a html template program.
It reads some data spesifying posts in the form of edn then creates an index.html file which links off to a html file for each post.
If I type
lein run
then onlly the index.html page is produced.
However if I type
lein repl
and then type
(-main)
then all the html pages are produced.
I thorght lein run just loads the project and runs the .core/-main function.
What am i missing hear?
Thanks
Hard to say for sure without seeing your code but I suspect lazy sequences are at work here.
When you run (-main) in the REPL, whatever is returned – the last expression in the function – is going to be fully realized as the REPL prints the value.
When you run lein run, it will run (-main) but it doesn’t care what the function returns (except for setting a shell exit code) so it will not cause a lazy sequence to be realized.
If you are doing something for side-effects, you should either use run! or doseq, depending on how your code is structured. You don’t want to use map.
This topic was automatically closed 182 days after the last reply. New replies are no longer allowed.