Replace dictionary keys in brackets with values via regex

Asked Oct 03 '19 at 12:17

Active Oct 03 '19 at 12:30

Viewed 201 times

I have a dictionary, for example:

var d = new Dictionary<string, string>();
    d.Add("key1", "value1");
    d.Add("key2", "value2");
    d.Add("key3", "value3");

I have input string, for example:

    var str = "[key1] - [key3]";

The result string should be:

"value1 - value3"

How can I achieve this with help of Regex?

asked Oct 03 '19 at 12:17

Storm

1

Why would you even consider a regex here? A loop and `String.Replace` would seem to be good enough (with a `StringBuilder` to minimize allocation). – Jeroen Mostert Oct 03 '19 at 12:21
@JeroenMostert that should work. I'll try this out. – Storm Oct 03 '19 at 12:22
@JeroenMostert that's not a bad code golf exercise, although relatively pointless here. – Panagiotis Kanavos Oct 03 '19 at 12:23
[You can't change a Key. You must create a new entry and remove the old one.](https://stackoverflow.com/questions/6499334/best-way-to-change-dictionary-key) – TaW Oct 03 '19 at 12:25
1

http://ideone.com/LwqOr1 – Wiktor Stribiżew Oct 03 '19 at 12:31
1

I just spent 5 minutes writing the answer!!!!! `var regex=new Regex("\\[(?.*?)\\]"); regex.Replace(str,m=>d[m.Groups["key"].Value])` – Panagiotis Kanavos Oct 03 '19 at 12:31
@WiktorStribiżew thanks for closing right before I posted the answer – Panagiotis Kanavos Oct 03 '19 at 12:31
That is a wrong solution anyway. See mine above. – Wiktor Stribiżew Oct 03 '19 at 12:33

0 Answers0