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David Alvarez
2,689 PointsTemporary constants in for in loops
When we code a "for in" loop, Swift assign a constant for each of the array elements. Why it is a let? In fact it should be a var, isn´t it?
The let changes in every step of the loop...but a constant can´t be changed.
3 Answers
tobiaskrause
9,160 PointsThe reason for this is, that the constant is, as you mentioned, temporable. Each time we loop throuh we are in a new scope. After the first loop the lifespan ends, since we are in a new scope.
The constant dont gets new values assigned...it gets recreated and a new instance per loop...something completely different. So it can be a constant.
David Alvarez
2,689 PointsAwesome answer!!
Thanks Tobias
