Can I use 'where' inside a for-loop in swift?
In Swift 2, new where syntax was added:
for value in boolArray where value == true { ...}In Pre 2.0 one solution would be to call .filter on the array before you iterate it:
for value in boolArray.filter({ $0 == true }) { doSomething()}
A normal for-loop will iterate all elements present in the list. But sometimes we want to iterate only when data satisfy some condition, there we can use where clause with for -loop. It's just a replacement of if condition inside the loop.
For example:
let numbers = [1,2,3,4,5,6,7]for data in numbers { if (data % 2 == 0) { print(data) }}can be rewritten in the simpler way as:
for data in numbers where data % 2 == 0 { print(data)}
Yes, you can use "where" clause with for loop.
let arr = [1,2,3,4,5]for value in arr where value != 0 { print(value)}Considering your example,
var boolArray: [Bool] = []//(...) set values and do stufffor value in boolArray where value == true { doSomething()}