Post-assignment operator ?
jorge at jorgechamorro.com
Sun Sep 5 10:42:45 PDT 2010
I've had the need to read and save an array element just before updating it to a new value:
If instead I had had to post-increment/decrement it I could have written just :
doSomethingWith( array[index]++ );
which is shorter, clearer, and does not need any temp. var.
So, my question/idea/proposal (I hope it's not too dumb) is, why not to create a "post-assignment" operator ? One that given the expression:
`aReference *postAssignmentOperator* newValue` would assign newValue to aReference but would return the value that it had before the assignment.
doSomethingWith( array[index] := newValue );
It may serve too to swap(a, b) :
a= ( b:= a )
More information about the es-discuss