Regex on string with dots

Question

I have the following string:

root.single_product.baby->teenager_furn.others.

I want to extract each string in front of the .-sign. I have came up with this:

Regex.Matches("root.single_product.baby->teenager_furn.others.", @"([\w]+)");

This gives me the following list:

root
single_product
baby
teenager_furn
others

But I want the following instead:

root
single_product
baby->teenager_furn
others

How can I accomplish this?

I'm pretty sure you're looking for Regex.Split or the normal string.Split function. — the default.
– the default., Commented Dec 20, 2019 at 12:38
@Bryan Use the pattern \. for Regex.Split or just the character . for string.Split — the default.
– the default., Commented Dec 20, 2019 at 12:40

Sweeper · Accepted Answer · 2019-12-20 12:41:21Z

2

Your current regex is matching "everything that is a word character". -> are not word characters, so they are not matched. Your regex doesn't seem to say much about matching things before the dot. If you want it to stay very permissive like this, you can do one of the following:

word characters, as well as - and >:
```
[\w->]+
```
everything that is not a dot:
```
[^.]+
```

If you want a regex that strictly matches things before dots, you can do something like:

[^.]+(?=\.)

or

([^.]+)\.

and extract group 1.

answered Dec 20, 2019 at 12:41

Sweeper

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Comments

TemaTre · Accepted Answer · 2019-12-20 12:45:25Z

1

Is it important for you to use Regex? Why you not use string.Split method? Here is example: https://dotnetfiddle.net/HQgFwm

Or you can use Regex.Split with pattern "(.)" as here https://dotnetfiddle.net/y6AGVY

edited Dec 20, 2019 at 12:45

answered Dec 20, 2019 at 12:40

TemaTre

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