Re: parallel for
gaurav v bagga wrote:
hi all,
if i have two arrays of same size and want to evaluate both of them in
parallel using
for(String s :<String array>){
}
how to do this
i'll appreciate if anyone helps me with this.....
regards
gaurav
A few approaches,
This first approach is the better designed approach in my opinion. If
you have to values that are associated with eachother, then they most
likely belong in the same object.
Take
String[] a;
Object[] b;
and refactor to:
class Entry {
String a;
Object b;
};
Entry[] entries;
Then you can use
for (Entry entry: entries) {
// do stuff with entry.a, entry b
}
---
Or, you can use
for (int i = 0; i < a.length && i < b.length; ++i) {
String aValue = a[i];
Object bValue = b[i];
}
---
Alternatively, you can create a "class ParallelArrayView<T1, T2>
implements Iterable<Entry<T1,T2>>", which takes the two arrays in a
constructor. You then right an interator that will access the two
arrays in parallel, and return an new Entry object with the currect
paring.
---
If you really need to do it with for each, you can use Python instead
of Java.
for <aValue, bValue> in zip(a, b):
# do stuff with aValue and bValue
Note, this is basically the same thing as the ParallelArrayView class I
showed you above.
---
I suggest using one of the first two methods, and ignoring the last
two.
Hope this helps,
Daniel.