Best way to specify whitespace in a String Split operation

Question

I am splitting a string based on whitespace as follows   string myStr    The quick brown fox jumps over the lazy dog    char   whitespace   new char            t     string   ssizes   myStr Split whitespace     It s irksome to define the char   array everywhere in my code I want to do this  Is there more efficent way that doesn t require the creation of the character array  which is prone to error if copied in different places

User · Answer

Note that adjacent whitespace will NOT be treated as a single delimiter, even when using String.Split(null). If any of your tokens are separated with multiple spaces or tabs, you'll get empty strings returned in your array.

From the documentation:

Each element of separator defines a separate delimiter character. If two delimiters are adjacent, or a delimiter is found at the beginning or end of this instance, the corresponding array element contains Empty.

User · Answer

Why dont you use        string   ssizes   myStr Split        t

User · Answer

Can t you do it inline   var sizes   subject Split new char            t        Otherwise  if you do this exact thing often  you could always create constant or something containing that char array   As others have noted you can according to the documentation also use null or an empty array  When you do that it will use whitespace characters automatically   var sizes   subject Split null

User · Answer

you can use     var FirstString   YourString Split   First      to split string

User · Answer

If repeating the same code is the issue  write an extension method on the String class that encapsulates the splitting logic

User · Answer

So don t copy and paste  Extract a function to do your splitting and reuse it    public static string   SplitWhitespace  string input        char   whitespace   new char            t         return input Split whitespace       Code reuse is your friend

User · Answer

Yes  There is need for one more answer here   All the solutions thus far address the rather limited domain of canonical input  to wit  a single whitespace character between elements  though tip of the hat to  cherno for at least mentioning the problem   But I submit that in all but the most obscure scenarios  splitting all of these should yield identical results   string myStrA    The quick brown fox jumps over the lazy dog   string myStrB    The  quick  brown  fox  jumps  over  the  lazy  dog   string myStrC    The quick brown fox      jumps over the lazy dog   string myStrD       The quick brown fox jumps over the lazy dog     String Split  in any of the flavors shown throughout the other answers here  simply does not work well unless you attach the RemoveEmptyEntries option with either of these   myStr Split new char 0   StringSplitOptions RemoveEmptyEntries  myStr Split new char          t    StringSplitOptions RemoveEmptyEntries    As the illustration reveals  omitting the option yields four different results  labeled A  B  C  and D  vs  the single result from all four inputs when you use RemoveEmptyEntries     Of course  if you don t like using options  just use the regex alternative  -   Regex Split myStr     s    Where s   gt  s    string Empty

User · Answer

If you just call  string   ssize   myStr Split null     Or myStr Split    or  string   ssize   myStr Split new char 0     then white-space is assumed to be the splitting character  From the string Split char    method s documentation page   If the separator parameter is null or contains no characters  white-space characters are assumed to be the delimiters  White-space characters are defined by the Unicode standard and return true if they are passed to the Char IsWhiteSpace method   Always  always  always read the documentation

User · Answer

Why don t you just do this   var ssizes   myStr Split    t  ToCharArray       It seems there is a method String ToCharArray   in  NET 4 0   EDIT  As VMAtm has pointed out  the method already existed in  NET 2 0

User · Answer

According to the documentation        If the separator parameter is null or contains no characters  white-space characters are assumed to be the delimiters  White-space characters are defined by the Unicode standard and return true if they are passed to the Char IsWhiteSpace method    So just call myStr Split    There s no need to pass in anything because separator is a params array

User · Answer

You can just do   string myStr    The quick brown fox jumps over the lazy dog   string   ssizes   myStr Split         MSDN has more examples and references   http   msdn microsoft com en-us library b873y76a aspx

[c#] Best way to specify whitespace in a String.Split operation

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