Having trouble with syntax in swift looping through an array - arrays

Question

I'm trying to figure out how to loop through this usernames array, but am not sure the syntax. I am using swift in xcode
I currently have:
// Read text file
if let filepath = NSBundle.mainBundle().pathForResource("barbers", ofType: "txt")
{
do
{
//let contents = try NSString(contentsOfFile: filepath, usedEncoding: nil) as String;
//print(contents);
let text = try NSString(contentsOfFile: filepath, usedEncoding: nil) as String;
// Create character array & parse
let usernames = text.characters
.split { $0 == "\n" }
.map { String($0) }
.map { String($0.characters.split(" ")[0]) }
// Print Users
print(usernames);
// Test
}
catch
{
// Catch error?
}
}
else
{
// Print error to console log
print("Error: Could not find text file - something went wrong");
}
My question is: How can I loop through my usernames array?
I just dont know the swift syntax
I'm looking for something like
for(int i =0; i < usernames.size(); i ++ )
{
if(usernames[i] == USER)
{
b = true;
break;
}
b = false;
}
UPDATES:
Ok so I've figured out how to loop through but now I'm having troubles
I made a global variable
var abc = "";
I then did
let abc = usernames;
now when I try to do this
// Test
for i in abc.characters
{
print("abc array contents: " + i);
if(i == theUser)
{
print("Barber");
barb = true;
break;
}
print("USER " + theUser);
barb = false;
print("\n");
}
I get the error
Binary operator '+' cannot be applied to operands of type 'String' and 'Character'
and
Binary operator '==' cannot be applied to operands of type 'Character' and 'String'

Answer 1

All of these above work, but my favorite Swifty for loop is
for index in 0..< usernames.count {
//your code here
//to get an object at a specific index you call usernames[index]
}
In response to your updated question I believe you need to cast your character as a string. Something like
let myCharacterAsAString = String(i)
print("abc array contents: " + myCharacterAsAString);
if(myCharacterAsAString == theUser)
{
print("Barber");
barb = true;
break;
}
print("USER " + theUser);
barb = false;
print("\n");
}

Answer 2

for username in usernames
{
if(username == USER)
{
b = true;
break;
}
b = false;
}
or if you need access to current item's index:
for (index, username) in usernames.enumerate()
{
// same body as above
}

Answer 3

I believe latest versions of Swift have done away with the C-style for-loop.
This might not be super helpful but the way to iterate in Swift would likely be with a for-in loop
for username in usernames
{
if username == USER
{
b = true
break
}
b = false
}