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Conditional "in" for arrays in Swift


Conditional "in" for arrays in Swift

By : user2955267
Date : November 22 2020, 10:38 AM
hop of those help? I'd suggest using an Array instead of a Tuple for your basic primes. Then you could use contains() to check if a number is in your array of basic primes. Something like this would work:
code :
let basicPrimes = [2, 3, 5, 7, 11, 13, 17, 19]
let number = 5

if contains(basicPrimes, number)
{
    println("Is prime!")
}


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Using the logical "or" in conditional indexing in python arrays

Using the logical "or" in conditional indexing in python arrays


By : user2029190
Date : March 29 2020, 07:55 AM
wish of those help Use a list comprehension to generate a new list:
code :
samples = [1 if i in (1, 2, 3) else i for i in samples]
swift: "for" loop and "if" statement return four arrays with one element instead of one array with f

swift: "for" loop and "if" statement return four arrays with one element instead of one array with f


By : Stipandello
Date : March 29 2020, 07:55 AM
I wish this helpful for you I have an array of NSDate. I am filtering this array with a timeIntervalSinceDate to only keep specific ones. After looping through the array, and submitting an "if" statement to compare the elements in the array with others, I intend to append the desired ones into a new array. , Reset self.dateX before the begin of the loop.
Swift: Conditional casts not needed but "must"?

Swift: Conditional casts not needed but "must"?


By : rarreola9x
Date : March 29 2020, 07:55 AM
I hope this helps you . Optional binding is used to in order to unwrap optionals, and your steeringItems and destinationPath are non-optionals.
Also, because destinationPath is a String, which can be freely bridged to NSString and steeringItems is a [SteeringItem], which can be bridged to NSArray (as SteeringItem is an NSObject) – you can freely up-cast them to AnyObject. Therefore you don't need to do any conditional casting (as it would never fail).
code :
func toDictionary() -> [String:AnyObject] {

    var retval = [String: AnyObject]()

    retval["steeringItems"] = steeringItems
    retval["gDstPath"] = destinationPath

    return retval
}
func toDictionary() -> [String:AnyObject] {
    return ["steeringItems":steeringItems, "gDstPath":destinationPath]
}
"Initializer for conditional binding must have Optional type, not '[Any]'" - Swift

"Initializer for conditional binding must have Optional type, not '[Any]'" - Swift


By : swaroop
Date : March 29 2020, 07:55 AM
hop of those help? Hey there George the thing you are doing wrong is using the guard statement wrong. The guard statement is used for unwrapping the value of an optional Object.
Now lets analyze your code. The thing that is optional is when you get the array of values saved in UserDefaults and it is of [Any]?. Now to take it one step further you know that you saved your values as an Array of Doubles so you would need to cast [Any]? to [Double]. So lets do that exactly. So here would be the end code if you were to fix everything.
code :
let defaults = UserDefaults.standard
let distanceElapsed = 0.0
let counter = 3.0
let paceVal = 5.4
let genericValues = [Double(distanceElapsed), Double(counter), Double(paceVal)]
defaults.set(genericValues, forKey: distTimeKey)

guard let distTime = defaults.array(forKey: distTimeKey) as? [Double] else {
    // Do something if there are no values or if the values in the array were not of type Array of double in distTime
    fatalError("Something wrong")
}
if distTime.count > 2 {
    let pace = distTime[2]
    let paceAsString = String(pace)
    print(paceAsString)
}
How To multiple Euro values total arrays in ios Swift 5 Like ["£179.95", "£199.95", "£89.95&quo

How To multiple Euro values total arrays in ios Swift 5 Like ["£179.95", "£199.95", "£89.95&quo


By : Ryan Patrick
Date : March 29 2020, 07:55 AM
I hope this helps you . If you're sure that the strings contained in your array always start with a £, you could do this:
code :
let sum = array.compactMap { Double($0.replacingOccurrences(of: "£", with: "")) }
               .reduce(0.0, { $0 + $1 })
let array = ["£179.95", "£199.95", "£89.95"]
let sum = array.compactMap { Double($0.replacingOccurrences(of: "£", with: "")) }
               .reduce(0.0, { $0 + $1 })
print(sum) // 469.84999999999997
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