Replace a substring in each element of a string array?

Question

Hey, I have an array of strings and I want to replace a certain substring in each of those elements. Is there an easy way to do that besides iterating the array explicitly?

Thanks :-)

Marc Gravell · Accepted Answer · 2010-09-16 07:50:26Z

6

Ultimately, anything you do is going to do exactly that anyway. A simple for loop should be fine. There are pretty solutions involving lambdas, such as Array.ConvertAll / Enumerable.Select, but tbh it isn't necessary:

for(int i = 0 ; i < arr.Length ; i++) arr[i] = arr[i].Replace("foo","bar");

(the for loop has the most efficient handling for arrays; and foreach isn't an option due to mutating the iterator variable)

answered Sep 16, 2010 at 7:50

Marc Gravell

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David Hedlund · Accepted Answer · 2010-09-16 07:47:20Z

5

You could iterate the array implicitly

arrayOfStrings = arrayOfStrings.Select(s => s.Replace("abc", "xyz")).ToArray();

answered Sep 16, 2010 at 7:47

David Hedlund

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2 Comments

Albin Sunnanbo Over a year ago

Strictly this does not replace elements in the array, it creates a new array with the replaced elements in. This makes i difference if the original arrayOfStrings was referenced elsewhere, like if arrayOfStrings was an in parameter in a method.

Albin Sunnanbo Over a year ago

@grady you can not use foreach(var s in arrayOfStrings) {s = s.Replace("foo", "bar"); } since you are not allowed to modify the foreach variable.

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