How do I replace an item in array with another item in a different array?

Question

I know the basic way of replacing an item in a string, but now how I am doing it. Here's my code. I'm trying to search a note for certain words and swap them out when I do find them. I have certain words to replace other certain words with and I need to match them up so the sentence still makes sense.

func searchNote1()
{
    let contentArr = note1.content.componentsSeparatedByString(" ")
    let count = contentArr.count
    var num = 0
    while num < count
    {
        if conciseArr.contains(contentArr[num])
        {
            contentArr[num] = conciseArr []
        }
        num += 1
    }
}

I am trying to replace the string in contentArr[num] (wherever a certain word is found) and swap it out with the string found in conciseArr. Where I am stuck is how do I know the location of the word in conciseArr to replace the other word with?

christopherdrum · Accepted Answer · 2016-07-01 05:37:05Z

2

Rather than .contains, look at indexOfObject. If the object exists in the conciseArray, you will get the index (location), otherwise you will get an NSNotFound. Then, if (location != NSNotFound)... (do your swap using the known indices)

And, while we're at it, perhaps fast enumeration would be appropriate here? (I'm an Obj-C guy; I hope my Swift syntax is right!)

func searchNote1()
{
    let contentArr = note1.content.componentsSeparatedByString(" ")
    for (index, element) in contentArr.enumerate()
    {
        var location = conciseArr.indexOfObject(element)
        if (location != NSNotFound)
        {
            contentArr[index] = conciseArr[location]
        }
    }
}

edited Jul 1, 2016 at 5:37

answered Jul 1, 2016 at 5:30

christopherdrum

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4 Comments

Seth Rodgers Over a year ago

This worked, temporarily. Now when the function has to replace more than one word in a sentence it just becomes one big jumble. Any idea on how to fix this?

christopherdrum Over a year ago

I would need to see the input and output to understand what is happening.

Seth Rodgers Over a year ago

Is there a way to PM on here or something? I don't want to post another question if I don't have to.

christopherdrum Over a year ago

@SethRodgers I don't think there is a PM. You don't need to post another question, just put in some sample data and your result here, and I'll fix my answer to address your problem.

Luca Angeletti · Accepted Answer · 2016-07-01 11:18:29Z

1

Given a sentence and a dictionary of synonyms

let sentence = "What a wonderful world"
let synonyms = ["wonderful":"beautiful", "world":"planet"]

This is how you get a new sentence with the synonyms

let newSentence = sentence
    .componentsSeparatedByString(" ")
    .map { synonyms[$0] ?? $0 }
    .joinWithSeparator(" ")

That's it

print(newSentence) // What a beautiful planet

answered Jul 1, 2016 at 11:18

Luca Angeletti

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Comments

lokusking · Accepted Answer · 2016-07-01 05:30:03Z

0

This should help you out:

if conciseArr.contains(contentArr[num])
        {
            contentArr[num] = conciseArr.indexOf(contentArr[num])
        }

answered Jul 1, 2016 at 5:30

lokusking

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How do I replace an item in array with another item in a different array?

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Given a sentence and a dictionary of synonyms

This is how you get a new sentence with the synonyms

That's it

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Collectives™ on Stack Overflow

3 Answers 3

4 Comments

Given a sentence and a dictionary of synonyms

This is how you get a new sentence with the synonyms

That's it

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