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split(n)                                    Tcl Built-In Commands                                   split(n)



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NAME
       split - Split a string into a proper Tcl list

SYNOPSIS
       split string ?splitChars?
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DESCRIPTION
       Returns  a  list  created  by  splitting string at each character that is in the splitChars argument.
       Each element of the result list will consist of the characters from string that lie between instances
       of  the  characters in splitChars.  Empty list elements will be generated if string contains adjacent
       characters in splitChars, or if the  first  or  last  character  of  string  is  in  splitChars.   If
       splitChars  is an empty string then each character of string becomes a separate element of the result
       list.  SplitChars defaults to the standard white-space characters.

EXAMPLES
       Divide up a USENET group name into its hierarchical components:
              split "comp.lang.tcl.announce" .
                    -> comp lang tcl announce

       See how the split command splits on every character in splitChars, which can  result  in  information
       loss if you are not careful:
              split "alpha beta gamma" "temp"
                    -> al {ha b} {} {a ga} {} a

       Extract the list words from a string that is not a well-formed list:
              split "Example with {unbalanced brace character"
                    -> Example with \{unbalanced brace character

       Split a string into its constituent characters
              split "Hello world" {}
                    -> H e l l o { } w o r l d

   PARSING RECORD-ORIENTED FILES
       Parse  a  Unix /etc/passwd file, which consists of one entry per line, with each line consisting of a
       colon-separated list of fields:
              ## Read the file
              set fid [open /etc/passwd]
              set content [read $fid]
              close $fid

              ## Split into records on newlines
              set records [split $content "\n"]

              ## Iterate over the records
              foreach rec $records {

                 ## Split into fields on colons
                 set fields [split $rec ":"]

                 ## Assign fields to variables and print some out...
                 lassign $fields \
                       userName password uid grp longName homeDir shell
                 puts "$longName uses [file tail $shell] for a login shell"
              }


SEE ALSO
       join(n), list(n), string(n)


KEYWORDS
       list, split, string



Tcl                                                                                                 split(n)