diff options
Diffstat (limited to 'doc/split.n')
| -rw-r--r-- | doc/split.n | 41 |
1 files changed, 23 insertions, 18 deletions
diff --git a/doc/split.n b/doc/split.n index 1333716..f1c66d0 100644 --- a/doc/split.n +++ b/doc/split.n @@ -5,10 +5,8 @@ '\" See the file "license.terms" for information on usage and redistribution '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. '\" -'\" RCS: @(#) $Id: split.n,v 1.5 2004/10/27 14:24:37 dkf Exp $ -'\" -.so man.macros .TH split n "" Tcl "Tcl Built-In Commands" +.so man.macros .BS '\" Note: do not modify the .SH NAME line immediately below! .SH NAME @@ -16,7 +14,6 @@ split \- Split a string into a proper Tcl list .SH SYNOPSIS \fBsplit \fIstring \fR?\fIsplitChars\fR? .BE - .SH DESCRIPTION .PP Returns a list created by splitting \fIstring\fR at each character @@ -31,34 +28,41 @@ If \fIsplitChars\fR is an empty string then each character of \fIstring\fR becomes a separate element of the result list. \fISplitChars\fR defaults to the standard white-space characters. .SH EXAMPLES +.PP Divide up a USENET group name into its hierarchical components: +.PP .CS -\fBsplit\fR "comp.lang.tcl.announce" . - \fI=> comp lang tcl announce\fR +\fBsplit\fR "comp.lang.tcl" . + \fI\(-> comp lang tcl\fR .CE .PP See how the \fBsplit\fR command splits on \fIevery\fR character in \fIsplitChars\fR, which can result in information loss if you are not careful: +.PP .CS \fBsplit\fR "alpha beta gamma" "temp" - \fI=> al {ha b} {} {a ga} {} a\fR + \fI\(-> al {ha b} {} {a ga} {} a\fR .CE .PP Extract the list words from a string that is not a well-formed list: +.PP .CS \fBsplit\fR "Example with {unbalanced brace character" - \fI=> Example with \\{unbalanced brace character\fR + \fI\(-> Example with \e{unbalanced brace character\fR .CE .PP Split a string into its constituent characters +.PP .CS \fBsplit\fR "Hello world" {} - \fI=> H e l l o { } w o r l d\fR + \fI\(-> H e l l o { } w o r l d\fR .CE .SS "PARSING RECORD-ORIENTED FILES" +.PP Parse a Unix /etc/passwd file, which consists of one entry per line, with each line consisting of a colon-separated list of fields: +.PP .CS ## Read the file set fid [open /etc/passwd] @@ -66,23 +70,24 @@ set content [read $fid] close $fid ## Split into records on newlines -set records [\fBsplit\fR $content "\\n"] +set records [\fBsplit\fR $content "\en"] ## Iterate over the records foreach rec $records { - ## Split into fields on colons - set fields [\fBsplit\fR $rec ":"] + ## Split into fields on colons + set fields [\fBsplit\fR $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" + ## Assign fields to variables and print some out... + lassign $fields \e + userName password uid grp longName homeDir shell + puts "$longName uses [file tail $shell] for a login shell" } .CE - .SH "SEE ALSO" join(n), list(n), string(n) - .SH KEYWORDS list, split, string +'\" Local Variables: +'\" mode: nroff +'\" End: |