Synopsis Compute the product of two lists.
Syntax
Exp1 * Exp2
Types
Exp1 | Exp2 | Exp1 * Exp2 |
|---|---|---|
list[T1] | list[T2] | list[tuple[T1,T2]] |
Description Yields a list of tuples resulting from the product of the values of
Exp1 and Exp2.
It contains a tuple for each combination of values from both arguments.
Examples
rascal>[1, 2, 3] * [4, 5, 6];
lrel[int,int]: [
<1,4>,
<1,5>,
<1,6>,
<2,4>,
<2,5>,
<2,6>,
<3,4>,
<3,5>,
<3,6>
]
Here is a concise way to create a deck of cards:
rascal>["clubs", "hearts", "diamonds", "spades"] * [1 .. 13];
lrel[str,int]: [
<"clubs",1>,
<"clubs",2>,
<"clubs",3>,
<"clubs",4>,
<"clubs",5>,
<"clubs",6>,
<"clubs",7>,
<"clubs",8>,
<"clubs",9>,
<"clubs",10>,
<"clubs",11>,
<"clubs",12>,
<"hearts",1>,
<"hearts",2>,
<"hearts",3>,
<"hearts",4>,
<"hearts",5>,
<"hearts",6>,
<"hearts",7>,
<"hearts",8>,
<"hearts",9>,
<"hearts",10>,
<"hearts",11>,
<"hearts",12>,
<"diamonds",1>,
<"diamonds",2>,
<"diamonds",3>,
<"diamonds",4>,
<"diamonds",5>,
<"diamonds",6>,
<"diamonds",7>,
<"diamonds",8>,
<"diamonds",9>,
<"diamonds",10>,
<"diamonds",11>,
<"diamonds",12>,
<"spades",1>,
<"spades",2>,
<"spades",3>,
<"spades",4>,
<"spades",5>,
<"spades",6>,
<"spades",7>,
<"spades",8>,
<"spades",9>,
<"spades",10>,
<"spades",11>,
<"spades",12>
]
Questions
Question [1].
When you compute the product of two lists, the number of elements in the result is always:
When you compute the product of two lists, the number of elements in the result is always:
Question [2].
Question [3].
Question [4].
Question [5].