Hi, List. I understand that there is a way of replacing the old "repeat with x=1 to 10" statement with something like
"repeat with each woord currentWord in myString"
How exactly is this used? This is foreign to me.
Thanks!
Imagine you are doing something like this:
repeat with i=1 to (the number of words in someVariable) put word i of someVariable into someWord doSomething someWord end repeat
These scripts are pretty common- iterating over all of the chunks in a container. They can get a bit inefficient with large variables. For example, when you ask for "item 100000" of something, Rev is forced to search from the beginning of the string, counting items until it finds the 100,000th one. And the next time through, it starts from the beginning to find 100,001, and so on. Since Rev doesn't actually know that you are always going to just look for the _next_ item, it can't just save your spot.
And so... (drum roll please)... it would be much more efficient if there were some way to grab each chunk sequentially, without the engine being forced to re-count from the beginning every time through. Thus, a special construct:
repeat for each word someWord in someVariable doSomething someWord end repeat
This will produce the exact same results* as the previous script, but will be much faster for large data sets (and looks nice and keeps you from screwing up your counter accidentally, etc)
Note that you can also repeat "for each line", "for each item", and even "for each element" (the elements of an array, try it!). Combine those with all of the possible things you can pass as containers, and you get a pretty fast, flexible way to process consecutive chunks (or elements) of the same thing.
* Of course, the "i" variable won't be set, but you can get it back if you really want by setting it's value beforehand and adding 1 to it in each iteration of the loop. This will still be quite fast.
Hope that helps,
- Brian
_______________________________________________ use-revolution mailing list [EMAIL PROTECTED] http://lists.runrev.com/mailman/listinfo/use-revolution
