JavaFX Primer - JavaFX: Developing Rich Internet Applications - page 59

Course {
title: "Geometry I"
students: [ "Clarke, "Connors", "Bruno" ]
},
Course {
title: "Geometry II"
students: [ "Clarke, "Connors", ]
},
Course {
title: "Algebra I"
students: [ "Connors", "Bruno" ]
},
];
for(course in courses, student in course.students) {
println("Student: {student} is in course {course}");
}
This prints out:
Student: Clarke is in course Geometry I
Student: Connors is in course Geometry I
Student: Bruno is in course Geometry I
Student: Clarke is in course Geometry II
Student: Connors is in course Geometry II
Student: Connors is in course Algebra I
Student: Bruno is in course Algebra I
There may be zero or more secondary loops and they are separated from the pre-
vious ones by a comma, and may reference any element from the previous loops.
You can also include a where clause on the sequence to limit the iteration to only
those elements where the where clause evaluates to true:
var evenNumbers = for( i in [0..1000] where i mod 2 == 0 ) i;
while
The while loop works similar to the while loop as seen in other languages:
var ndx = 0;
while ( ndx < 100) {
println("{ndx}");
ndx++;
}
Note that unlike the JavaFX for loop, the while loop does not return any expres-
sion, so it cannot be used to create a sequence.