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
## 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"
}