Inserting a comma after every character in a string? Objective C

Question

Hello I'm receiving a string that contains a zipcode. E.G. "34747" and I need to convert it to something like this "3,4,7,4,7"

What would be the best way to implement this in Objective C?

I would split it into an array of characters and then join it with the comma as a separator. In Swift it's a one-liner: Array(zipcode).map(String.init).joined(separator:",") — matt
– matt, Commented Jun 15, 2018 at 15:10

Alper · Accepted Answer · 2018-06-15 15:45:45Z

2

In Objective-C it's pretty awful:

NSMutableArray *characters = [[NSMutableArray alloc] initWithCapacity:[myString length]];

for (int i=0; i < [myString length]; i++) {
    NSString *ichar  = [NSString stringWithFormat:@"%C", [myString characterAtIndex:i]];
    [characters addObject:ichar];
}

NSString *output = [characters componentsJoinedByString:@","];

edited Jun 15, 2018 at 15:45

answered Jun 15, 2018 at 15:09

Alper

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1 Comment

Octavio Rojas Over a year ago

Thanks for your answer! It worked pretty well although I agree Objective C's solution is way more awful than Swift's.

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