On 6/20/21 8:59 PM, someone wrote:
I often need to iterate through a filtered collection (associative
array) as following:
```d
string strComputerIDunwanted = "WS2"; /// associative array key to exclude
foreach (strComputerID, udtComputer; udtComputers) { /// ..remove!(a =>
a == strComputerIDunwanted) ... ?
if (strComputerID != strComputerIDunwanted) {
...
}
}
```
Is there a way to filter the collection at the foreach-level to avoid
the inner if ?
Two options for byKey and byKeyValue:
import std;
void main() {
auto aa = [ "WS2" : 42, "WS3" : 43 ];
string strComputerIDunwanted = "WS2";
foreach (key; aa.byKey.filter!(k => k != strComputerIDunwanted)) {
writeln(key, ' ', aa[key]);
}
// 't' is the tuple of key and value
foreach (t; aa.byKeyValue.filter!(t => t.key != strComputerIDunwanted)) {
writeln(t.key, ' ', t.value);
}
}
Ali
