'\"
'\" Generated from file 'trim\&.man' by tcllib/doctools with format 'nroff'
'\"
.TH "textutil::trim" 3tcl 0\&.7 tcllib "Text and string utilities, macro processing"
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.SH NAME
textutil::trim \- Procedures to trim strings
.SH SYNOPSIS
package require \fBTcl  8\&.2\fR
.sp
package require \fBtextutil::trim  ?0\&.7?\fR
.sp
\fB::textutil::trim::trim\fR \fIstring\fR ?\fIregexp\fR?
.sp
\fB::textutil::trim::trimleft\fR \fIstring\fR ?\fIregexp\fR?
.sp
\fB::textutil::trim::trimright\fR \fIstring\fR ?\fIregexp\fR?
.sp
\fB::textutil::trim::trimPrefix\fR \fIstring\fR \fIprefix\fR
.sp
\fB::textutil::trim::trimEmptyHeading\fR \fIstring\fR
.sp
.BE
.SH DESCRIPTION
The package \fBtextutil::trim\fR provides commands that trim
strings using arbitrary regular expressions\&.
.PP
The complete set of procedures is described below\&.
.TP
\fB::textutil::trim::trim\fR \fIstring\fR ?\fIregexp\fR?
Remove in \fIstring\fR any leading and trailing substring according to
the regular expression \fIregexp\fR and return the result as a new
string\&.  This is done for all \fIlines\fR in the string, that is any
substring between 2 newline chars, or between the beginning of the
string and a newline, or between a newline and the end of the string,
or, if the string contain no newline, between the beginning and the
end of the string\&.
The regular expression \fIregexp\fR defaults to "[ \\\\t]+"\&.
.TP
\fB::textutil::trim::trimleft\fR \fIstring\fR ?\fIregexp\fR?
Remove in \fIstring\fR any leading substring according to the regular
expression \fIregexp\fR and return the result as a new string\&. This
apply on any \fIline\fR in the string, that is any substring between
2 newline chars, or between the beginning of the string and a newline,
or between a newline and the end of the string, or, if the string
contain no newline, between the beginning and the end of the string\&.
The regular expression \fIregexp\fR defaults to "[ \\\\t]+"\&.
.TP
\fB::textutil::trim::trimright\fR \fIstring\fR ?\fIregexp\fR?
Remove in \fIstring\fR any trailing substring according to the regular
expression \fIregexp\fR and return the result as a new string\&. This
apply on any \fIline\fR in the string, that is any substring between
2 newline chars, or between the beginning of the string and a newline,
or between a newline and the end of the string, or, if the string
contain no newline, between the beginning and the end of the string\&.
The regular expression \fIregexp\fR defaults to "[ \\\\t]+"\&.
.TP
\fB::textutil::trim::trimPrefix\fR \fIstring\fR \fIprefix\fR
Removes the \fIprefix\fR from the beginning of \fIstring\fR and
returns the result\&. The \fIstring\fR is left unchanged if it doesn't
have \fIprefix\fR at its beginning\&.
.TP
\fB::textutil::trim::trimEmptyHeading\fR \fIstring\fR
Looks for empty lines (including lines consisting of only whitespace)
at the beginning of the \fIstring\fR and removes it\&. The modified
string is returned as the result of the command\&.
.PP
.SH "BUGS, IDEAS, FEEDBACK"
This document, and the package it describes, will undoubtedly contain
bugs and other problems\&.
Please report such in the category \fItextutil\fR of the
\fITcllib Trackers\fR [http://core\&.tcl\&.tk/tcllib/reportlist]\&.
Please also report any ideas for enhancements you may have for either
package and/or documentation\&.
.PP
When proposing code changes, please provide \fIunified diffs\fR,
i\&.e the output of \fBdiff -u\fR\&.
.PP
Note further that \fIattachments\fR are strongly preferred over
inlined patches\&. Attachments can be made by going to the \fBEdit\fR
form of the ticket immediately after its creation, and then using the
left-most button in the secondary navigation bar\&.
.SH "SEE ALSO"
regexp(3tcl), split(3tcl), string(3tcl)
.SH KEYWORDS
prefix, regular expression, string, trimming
.SH CATEGORY
Text processing