diff options
Diffstat (limited to 'doc/string.n')
| -rw-r--r-- | doc/string.n | 29 |
1 files changed, 16 insertions, 13 deletions
diff --git a/doc/string.n b/doc/string.n index 1cbea16..6b3cc59 100644 --- a/doc/string.n +++ b/doc/string.n @@ -25,11 +25,13 @@ Returns a decimal string giving the number of bytes used to represent \fIstring\fR in memory. Because UTF\-8 uses one to three bytes to represent Unicode characters, the byte length will not be the same as the character length in general. The cases where a script cares about -the byte length are rare. In almost all cases, you should use the +the byte length are rare. +.RS +.PP +In almost all cases, you should use the \fBstring length\fR operation (including determining the length of a -Tcl ByteArray object). Refer to the \fBTcl_NumUtfChars\fR manual +Tcl byte array value). Refer to the \fBTcl_NumUtfChars\fR manual entry for more details on the UTF\-8 representation. -.RS .PP \fICompatibility note:\fR it is likely that this subcommand will be withdrawn in a future version of Tcl. It is better to use the @@ -149,7 +151,8 @@ Any Unicode printing character, including space. .IP \fBpunct\fR 12 Any Unicode punctuation character. .IP \fBspace\fR 12 -Any Unicode space character. +Any Unicode whitespace character, zero width space (U+200b), +word joiner (U+2060) and zero width no-break space (U+feff) (=BOM). .IP \fBtrue\fR 12 Any of the forms allowed to \fBTcl_GetBoolean\fR where the value is true. @@ -198,9 +201,9 @@ will return \fB1\fR. . Returns a decimal string giving the number of characters in \fIstring\fR. Note that this is not necessarily the same as the -number of bytes used to store the string. If the object is a -ByteArray object (such as those returned from reading a binary encoded -channel), then this will return the actual byte length of the object. +number of bytes used to store the string. If the value is a +byte array value (such as those returned from reading a binary encoded +channel), then this will return the actual byte length of the value. .TP \fBstring map\fR ?\fB\-nocase\fR? \fImapping string\fR . @@ -335,22 +338,22 @@ specified using the forms described in \fBSTRING INDICES\fR. . Returns a value equal to \fIstring\fR except that any leading or trailing characters present in the string given by \fIchars\fR are removed. If -\fIchars\fR is not specified then white space is removed (spaces, -tabs, newlines, and carriage returns). +\fIchars\fR is not specified then white space is removed (any character +for which \fBstring is space\fR returns 1, and "\0"). .TP \fBstring trimleft \fIstring\fR ?\fIchars\fR? . Returns a value equal to \fIstring\fR except that any leading characters present in the string given by \fIchars\fR are removed. If -\fIchars\fR is not specified then white space is removed (spaces, -tabs, newlines, and carriage returns). +\fIchars\fR is not specified then white space is removed (any character +for which \fBstring is space\fR returns 1, and "\0"). .TP \fBstring trimright \fIstring\fR ?\fIchars\fR? . Returns a value equal to \fIstring\fR except that any trailing characters present in the string given by \fIchars\fR are removed. If -\fIchars\fR is not specified then white space is removed (spaces, -tabs, newlines, and carriage returns). +\fIchars\fR is not specified then white space is removed (any character +for which \fBstring is space\fR returns 1, and "\0"). .TP \fBstring wordend \fIstring charIndex\fR . |