Split and join C string

Question

Possible Duplicate    First split then join a subset of a string       I m trying to split a string into an array  take first element out  use it  and then join the rest of the array into a seperate string   Example   theString    Some Very Large String Here    Would become   theArray      Some    Very    Large    String    Here      Then I want to set the first element in a variable and use it later on   Then I want to join the rest of the array into a new string   So it would become   firstElem    Some   restOfArray    Very Large String Here    I know I can use theArray 0  for the first element  but how would I concatinate the rest of the array to a new string

User · Answer

You can split and join the string  but why not use substrings  Then you only end up with one split instead of splitting the string into 5 parts and re-joining it  The end result is the same  but the substring is probably a bit faster   string lcStart    Some Very Large String Here   int lnSpace   lcStart IndexOf        if  lnSpace  gt  -1        string lcFirst   lcStart Substring 0  lnSpace       string lcRest   lcStart Substring lnSpace   1

User · Answer

Well  here is my  answer   It uses the fact that String Split can be told hold many items it should split to  which I found lacking in the other answers    string theString    Some Very Large String Here   var array   theString Split new             2      return at most 2 parts    note  be sure to check it s not an empty array string firstElem   array 0      note  be sure to check length first string restOfArray   array 1     This is very similar to the Substring method  just by a different means

User · Answer

You can use string Split and string Join   string theString    Some Very Large String Here   var array   theString Split       string firstElem   array First    string restOfArray   string Join      array Skip 1      If you know you always only want to split off the first element  you can use   var array   theString Split      2     This makes it so you don t have to join   string restOfArray   array 1

[c#] Split and join C# string

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