CODEWITHSUNDEEP
swift
Rahul
Rahul

Reputation: 905

How to update tuples array in Swift?

I have one tuple array for

e.g. [(Student, Bool)] and other Bool array as [true, false, false]

I want to update tuple bool value as per bool array, for example:

var tupleArray = [("first", true), ("second", false ), ("third", true)]
var boolArray = [true, false, false]

Result should be:

var tupleArray = [("first", true), ("second", false ), ("third", false)]

Is there any best way to achieve this?

Upvotes: 1

Views: 408

Answers (3)

Joakim Danielson
Joakim Danielson

Reputation: 51972

A simple solution is to enumerate and use map

tupleArray = tupleArray.enumerated().map { ($1.0, boolArray[$0]) }

Or use zip as mentioned in the comments

tupleArray = Array(zip(tupleArray.map { $0.0 }, boolArray))

If the arrays are of different size or rather if tupleArray is longer than boolArray we have an issue, the first code will crash and the second will only include the same number of elements from tupleArray as exists in boolArray

To fix the first code we could use the original value from tupleArray

tupleArray = tupleArray.enumerated()
    .map { ($1.0, $0 < boolArray.count ? boolArray[$0] : $1.1) }

Upvotes: 2

user652038
user652038

Reputation: 

zip(tupleArray, boolArray).map { ($0.0, $1) }

Upvotes: 2

Ice
Ice

Reputation: 757

You can use the next trick for that:

var tupleArray = [("first", true), ("second", false ), ("third", true)]
print(tupleArray)
var boolArray = [true, false, false]

for i in 0...(tupleArray.count - 1) {
    tupleArray[i].1 = boolArray[i]
}

print(tupleArray)

Result will be next:

[("first", true), ("second", false), ("third", true)]
[("first", true), ("second", false), ("third", false)]

Upvotes: -3

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