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| author | Steve Bennett <steveb@workware.net.au> | 2020-12-10 20:05:15 +1000 |
|---|---|---|
| committer | Steve Bennett <steveb@workware.net.au> | 2020-12-11 22:00:00 +1000 |
| commit | 0490da395651936d844cce2e32d4972cc2ba985a (patch) | |
| tree | 3a118717b441eef30618a9db6e2bfe84e709aaf1 /jim_tcl.txt | |
| parent | a2816313da54dcadcdb8eecb3875fcc7373432ea (diff) | |
| download | jimtcl-0490da395651936d844cce2e32d4972cc2ba985a.zip jimtcl-0490da395651936d844cce2e32d4972cc2ba985a.tar.gz jimtcl-0490da395651936d844cce2e32d4972cc2ba985a.tar.bz2 | |
list, string: support any number of +/-n for index
It is especially convenient to add -1 for something like:
lindex $list end-$BACK-1
or:
string range $str $p $p+$len-1
Signed-off-by: Steve Bennett <steveb@workware.net.au>
Diffstat (limited to 'jim_tcl.txt')
| -rw-r--r-- | jim_tcl.txt | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/jim_tcl.txt b/jim_tcl.txt index 73615c6..328aaab 100644 --- a/jim_tcl.txt +++ b/jim_tcl.txt @@ -55,6 +55,7 @@ RECENT CHANGES Changes since 0.80 ~~~~~~~~~~~~~~~~~~ 1. TIP 582, comments allowed in expressions +2. Indexes may contain any number of +n, -n Changes between 0.79 and 0.80 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ @@ -655,17 +656,18 @@ The index may be one of the following forms: A simple integer, where '0' refers to the first element of the string or list. -+integer+integer+ or:: -+integer-integer+:: - The sum or difference of the two integers. e.g. +2+3+ refers to the 5th element. ++integer+integer?...?+ or:: ++integer-integer?...?+:: + The sum or difference of the two or more integers. e.g. +2+3-1+ refers to the 4th element. This is useful when used with (e.g.) +$i+1+ rather than the more verbose +[expr {$i+1\}]+ +end+:: The last element of the string or list. -+end-integer+:: - The 'nth-from-last' element of the string or list. ++end-integer?...?+:: + The 'nth-from-last' element of the string or list. Again, one or more integers may + be added or subtracted. e.g. +end-3+1+ COMMAND SUMMARY --------------- |