How to get string after specific string?

Question

How to get string after text "playlist:" ?

var YT= "tag:youtube.com,2008:user:hollywoodlife09:playlist:PLDovhwKa3P88MwGzYxMDMfiAiiEWxAJYj" ;

What I did :

string[] s = YT.Split(':');

But it will give me array i.e s[0],s[1] ... and I am searching for something which can give result after specific text.

I want string after "playlist:", I know it may be easy with Regex,but currently I don't have any idea for Regex..

Selman Genç · Accepted Answer · 2014-03-31 14:30:38Z

9

You can use Substring method

var output = inputString.SubString(inputString.LastIndexOf("playlist") + 8);

Or in this case it can be done using Last method via Split:

string output = YT.Split(':').Last();

answered Mar 31, 2014 at 14:30

Selman Genç

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2 Comments

Amicable Over a year ago

I'd use this method because this is quite a simple program and regex generally reduces readability of code greatly.

iheanyi Over a year ago

You can also split on "playlist:".

Sabuj Hassan · Accepted Answer · 2014-03-31 14:26:30Z

3

Using regex replace, remove everything before the :playlist: with empty string.

string playlist = Regex.Replace(YT, ".*:playlist:", "");

answered Mar 31, 2014 at 14:26

Sabuj Hassan

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Comments

Jodrell · Accepted Answer · 2014-03-31 14:44:26Z

more reusably,

static IEnumerable<KeyValuePair<string, string>> SplitPairs(
    this string source,
    params char[] seperators)
{
    var values = source.Split(seperators);
    for(var i = 0; i < values.Length; i += 2)
    {
        yield return new KeyValuePair<string, string>(
            values[i],
            values[i + 1]);
    }
}

so you could do,

var yTlookup = YT.SplitPairs(':').ToDictionary(p => p.Key, p => p.Value);
var playList = yTLookup["playlist"];

or if you don't want an extension,

var segments = YS.Split(new[] { ':' });
var ySlookup = Enumerable.Range(0, segemnts.Length / 2)
    .ToDictionary(i => segments[i * 2], i => segments[(i * 2) + 1]);

so you can do,

var playlist = ysLookup["playlist"];

either approach pays off as soon as you want another value from the sequence.

carlpett · Accepted Answer · 2014-03-31 14:26:52Z

1

The regex is .+playlist:([^:])

answered Mar 31, 2014 at 14:26

carlpett

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