CODEWITHSUNDEEP
stringswift
t1ser
t1ser

Reputation: 1624

trim numerical and separator values from the beginning of strings in swift

From:

let fruit = ["012Red Apple", "03218Yellow Banana", "11 Orange Orange"]

I would like to get:

var result = ["Red Apple", "Yellow Banana", "Orange Orange"]

What is the best way to do this in the latest Swift?

Upvotes: 0

Views: 76

Answers (4)

Leo Dabus
Leo Dabus

Reputation: 236360

You can also use a regex of find the range of digits, spaces, etc.. at the beginning of your strings and use removeRange() method:

var fruits = ["012Red Apple", "03218Yellow Banana", "11 Orange Orange"]

for (index,fruit) in fruits.enumerate() {
    if let range = fruit.rangeOfString("[\\d )-]*\\s*", options: .RegularExpressionSearch) {
        fruits[index].removeRange(range)
    }
}

print(fruits) // ["Red Apple", "Yellow Banana", "Orange Orange"]\n"

Upvotes: 1

Thomas
Thomas

Reputation: 1319

Try this regex, i think it'll fit what you want:

let fruits = ["012Apple red", "03218Banana cool", "11 Orange black 133"]
var results = [String]()

for fruit in fruits {

    if let match = fruit.rangeOfString("[a-zA-Z ]+", options: .RegularExpressionSearch) {

        results.append(fruit.substringWithRange(match))
    }
}
print(results) // Apple red, Banana cool, Orange black

Upvotes: 1

Thomas
Thomas

Reputation: 1319

You can use a regular expression like this:

let fruits = ["012Apple", "03218Banana", "11 Orange"]
var results = [String]()

for fruit in fruits {

    if let match = fruit.rangeOfString("[a-zA-Z]+", options: .RegularExpressionSearch) {

        results.append(fruit.substringWithRange(match))
    }
}
print(results) // Apple, Banana, Orange

Upvotes: 1

Stefan Salatic
Stefan Salatic

Reputation: 4513

You can do it like this

var fruitAlpha: [String] = []
for f in fruit {
    fruitAlpha.append(f.stringByTrimmingCharactersInSet(NSCharacterSet.letterCharacterSet().invertedSet))
}

As Leo noted, it's better to use just letter set and just invert it. This will work for all non letter characters.

Upvotes: 3

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