split - Split a string into a proper Tcl list
split string ?
splitChars?
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.
Divide up a USENET group name into its hierarchical components:
split "comp.lang.tcl" .
→ comp lang tcl
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
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"
}
join(3tcl),
list(3tcl),
string(3tcl)
list, split, string