Re: better flatten()?
- Posted by DerekParnell (admin) Jul 27, 2015
- 1524 views
Here's my efforts ...
unfortunately this is what I get:
s = flatten({"abc",'x','y'}, ", ") -- s is "abc, xy"
whereas I was expecting to see "abc, x, y", which is what my latest code above (just updated with a minor edit that did not change the outcome), Greg's, and my hastily-just-updated (which did change the result) version of Greg's code deliver.
Pete
I was going by the documentation in the current library one. It says 'An optional delimiter to place after each flattened sub-sequence (except the last one).' And as the source in your last example {"abc",'x','y'} has only one sub-sequence (the "abc"), I would have expected only one delimiter to be inserted. However, I do acknowledge that I interpreted the phrase (except the last one) to mean (except if the sub-sequence is the last element). Therefore I feel my code is producing what the original author has specified.
This why functional specifications are so important and extremely hard to write, often harder than implementing them in code.
