On Nov 3, 2013, at 3:35 PM, Tamara Temple <[email protected]> wrote:
> > On Nov 1, 2013, at 9:20 AM, leo nike <[email protected]> wrote: > >> Hi, I Want to simply print out 2d array elements. Method is located in >> Helper module. Calling helper method from jQuery. At the moment I'm not >> getting output (=> 0..3) I tried to do iterate through array via .each() >> method, but it would just print en entire array, however i want to >> access each element and convert it either to string or integer. can >> someone point me to possible solution? thanks! >> >> #app/helpers/controller_helper.rb >> def get_array >> database = SQLite3::Database.open("test.db") >> result = database.execute("select * from table1") >> print_array(result) >> end >> >> def print_array(array) >> for i in 0..array.length >> puts array[i][i] >> end >> end >> >> ------------------------------------------------------------------- >> #app/views/controller/file.js.erb >> if($('.check_box1').is(':checked')){ >> $("#div2").html("<%= get_array%>") >> } >> >> -- >> Posted via http://www.ruby-forum.com/. > > You don’t want to use puts in there. You want to return the value so it gets > evaluated in the erb code. puts returns nil, which means you get nothing > inside the html element. > > I’m not exactly sure from that method what you want inside div2 either. > > Here’s what I’d suggest: > > def get_array() > # sqlite stuff as you have it > format_table(result) > end > > def format_table(data) > out = "<table>\n" > out += data.map do |row| > format_row(row) > end.join("\n") > out += "\n</table>\n" > end > > def format_row(row) > out = "<tr>" > out += row.map do |cell| > format_cell(cell) > end.join > out += "</tr>" > end > > def format_cell(cell) > "<td>#{cell}</td>" > end > > This will output html code, which seems like what you’d want at that point. then i decided it was too 'wet', and refactored: def wrap(s, tag, attr={}, &b) s = [s] unless s.is_a? Array attr = attr.empty? ? '' : " #{attr.map{|k,v| "#{k}='#{v}'"}.join(" ")}" out = "<#{tag}#{attr}>" out += s.inject("") {|m,o| m+="#{block_given? ? (yield o) : o}"} out += "</#{tag}>" end def format_table(data) wrap(data,"table",border: 1) do |row| wrap(row,"tr") do |cell| wrap(cell,"td") end end end data=[[1,2,3,4],[5,6,7,8]] formate_table(data) # => "<table border='1'><tr><td>1</td><td>2</td><td>3</td><td>4</td></tr><tr><td>5</td><td>6</td><td>7</td><td>8</td></tr></table>" (https://gist.github.com/tamouse/7300078 ) -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/BD222CFA-9460-42E5-A0DF-5B606F621707%40gmail.com. For more options, visit https://groups.google.com/groups/opt_out.
