Regular expression in C# parse into double array

Question

I'm not to good in Regular Expressions. I have

string rgba = "[0.123,0.223,0.2,1]";

What would be the best way to covert it into double[] ?

assuming rgba strings have no spaces? (like [0.1, 1.0, 0.5, 1 ] — Ming-Tang
– Ming-Tang, Commented Dec 26, 2010 at 0:32

Yuriy Faktorovich · Accepted Answer · 2010-12-26 00:33:16Z

7

rgba.Replace("]", String.Empty)
    .Replace("[", String.Empty)
    .Split(',')
    .Select(double.Parse)
    .ToArray();

Or if you know that it will always start with [ and end with ]

rgba.Substring(1, rgba.Length - 2)
    .Split(',')
    .Select(double.Parse)
    .ToArray();

And if you don't like LINQ

Array.ConvertAll(rgba.Substring(1, rgba.Length - 2).Split(','), double.Parse);

Regex is quite expensive to use, and I wouldn't recommend it in this case.

answered Dec 26, 2010 at 0:28

Yuriy Faktorovich

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Comments

jakobbotsch · Accepted Answer · 2010-12-26 00:57:24Z

0

You can use a regex with body:

\d+\.\d*

The regex will match one or more digits, then a single dot, then any number of digits.

answered Dec 26, 2010 at 0:57

jakobbotsch

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