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iosnsarraynsset

Compare Items in NSArray

My NSArray contains a day of the week followed by space and a number. The array looks like this:

(
    "Monday 1 - Rapids",
    "Monday 2 - Durango Shopping",
    "Monday - Train"
)

What I need to do is to scan through the array for the one with the highest number, and delete everything else. Any thoughts?

Solution

  • There are various ways to do this.

    You could use componentsSeparatedByString: @" " to break each item into words and then take intValue of the second item in each resulting array. That would be easy, but use rather a lot of temporary memory and probably be kind of slow.

    You could write code using NSScanner to extract the item between the first and second spaces.

    You could write a regular expression that would match on the second word and return an empty room sting if it's not a number. (You'd make the number a "capture group".)