let users = ["Hello", "1212", "12", "Bob", "Rob"]
I want to get the first user whose name length is 2, so I filtered the array and got the first user
if let selected = users.filter{$0.characters.count == 2}.first {
print(selected)
}
This code is thrown under swift 2.2 A compilation error occurred
Continuous statements on one line must be separated by’;’
However, this works fine
let selected = users.filter{$0.characters.count == 2}.first
if let selected = selected {
print(selected)
}
Anyone can Explain why I need to store the filtered results in a separate variable first? Any help will be greatly appreciated.
if let selected = users.filter({$0.characters.count == 2}).first {
print(selected)
}
This is the right way. Sometimes on lines with extra elements, the trailing closure syntax does not work well. You can also surround the entire statement Add parentheses:
if let selected = (users.filter {$0.characters.count == 2}.first) {
print(selected)
}
Swift is having trouble parsing your statement. Parentheses help in how to parse the line. You should prefer the first way because the closure is indeed the filter parameter , So enclosing it in parentheses will make Swift make it clear that you pass it to the filter.
Suppose I have a set of usernames
< p>
let users = ["Hello", "1212", "12", "Bob", "Rob"]
I want to get the first name with a length of 2 Users, so I filtered the array and got the first user
if let selected = users.filter{$0.characters.count == 2}.first {
print(selected)
}
This code throws a compilation error under Swift 2.2
Continuous statements on one line must be separated by’;’
But, this works fine
let selected = users.filter{$0.characters.count == 2}.first
if let selected = selected {
print(selected)
}
Anyone can solve Explain why I need to store the filtered results in a separate variable first? Any help would be greatly appreciated.
You can do this by putting parentheses around the closure you pass to the filter:
< /p>
if let selected = users.filter({$0.characters.count == 2}).first {
print(selected)
} This is the correct way. Sometimes the trailing closure syntax does not work well on lines with extra elements. You can also put parentheses around the entire statement:
< /p>
if let selected = (users.filter {$0.characters.count == 2}.first) {
print(selected)
}
Swift is in I'm having trouble parsing your statement. The parentheses give help in how to parse the line. You should prefer the first way because the closure is indeed a parameter of the filter, so enclosing it in parentheses makes Swift clear Means you pass it to the filter.