webmcp
annotate framework/env/param/iterate.lua @ 53:a1c77838c2e5
Documentation for "attr", "a_attr" and "form_attr" arguments to function ui.link{...}
| author | jbe |
|---|---|
| date | Fri Jun 10 15:32:29 2011 +0200 (2011-06-10) |
| parents | 9fdfb27f8e67 |
| children |
| rev | line source |
|---|---|
| jbe/bsw@0 | 1 --[[-- |
| jbe/bsw@0 | 2 for |
| jbe/bsw@0 | 3 index, -- index variable counting up from 1 |
| jbe/bsw@0 | 4 prefix -- prefix string with index in square brackets to be used as a prefix for a key passed to param.get or param.get_list |
| jbe/bsw@0 | 5 in |
| jbe/bsw@0 | 6 param.iterate( |
| jbe/bsw@0 | 7 prefix -- prefix to be followed by an index in square brackets and another key |
| jbe/bsw@0 | 8 ) |
| jbe/bsw@0 | 9 do |
| jbe/bsw@0 | 10 ... |
| jbe/bsw@0 | 11 end |
| jbe/bsw@0 | 12 |
| jbe/bsw@0 | 13 This function returns an interator function to be used in a for loop. The CGI GET/POST parameter (or internal parameter) with the name "prefix[len]" is read, where 'prefix' is the prefix passed as the argument and 'len' ist just the literal string "len". For each index from 1 to the read length the returned iterator function returns the index and a string consisting of the given prefix followed by the index in square brackets to be used as a prefix for keys passed to param.get(...) or param.get_list(...). |
| jbe/bsw@0 | 14 |
| jbe/bsw@0 | 15 --]]-- |
| jbe/bsw@0 | 16 |
| jbe/bsw@0 | 17 function param.iterate(prefix) |
| jbe/bsw@0 | 18 local length = param.get(prefix .. "[len]", atom.integer) or 0 |
| jbe/bsw@0 | 19 if not atom.is_integer(length) then |
| jbe/bsw@0 | 20 error("List length is not a valid integer or nil.") |
| jbe/bsw@0 | 21 end |
| jbe/bsw@0 | 22 local index = 0 |
| jbe/bsw@0 | 23 return function() |
| jbe/bsw@0 | 24 index = index + 1 |
| jbe/bsw@0 | 25 if index <= length then |
| jbe/bsw@0 | 26 return index, prefix .. "[" .. index .. "]" |
| jbe/bsw@0 | 27 end |
| jbe/bsw@0 | 28 end |
| jbe/bsw@0 | 29 end |