metaprogramming - How to create a method like ".find_by_something_and_something_else" using Ruby? -

-

By using Ruby I know that you can be very creative with the names of your methods, for example, Pass .find_by_this_and_that .

How can I do this?

Example: 

  def get_persons_with_5_things res = [] Individuals Unit | Person If person.number_of_things ==% coincident number 5 function NAME% Res & lt; & Lt; The person end-end return ridge and

I'm also not sure how you call such things, so any signal will be appreciated.

I'm a bit confused with your example. If you define the method with the hardcoded 5 in the name of the method, then you do not need to understand magically in the body of the method. If you want to do something dynamic with the method, then something like this will happen: 

  def method_missing (name, * args) if name.to_s = ~ / get_persons_with _ (\ d +) _ things / Number_of_things = $ 1.to_i res = [] Individuals.Each | Person If person.number_of_things == number_of_things res & lt; & Lt; (Android) End and return super (name, * AGR) and end

[edit (Jorge W. Meteague)]: This is a more robust method of implementing the same method: /p> 

  def method_missing (name, * args) return super when name.to_s = ~ / get_persons_with _ (\ d +) _ things / number_ of_things = $ 1.to_i return persons Selection {| Person
  • super passes only the original arguments without any argument, there is no need to explicitly pass them
    • <
  • or protected by an initial back a trailing until the expression does not clear the control flow
  • all < Code> Each iterator, select items according to one object; However, there is already an Iterator to select items: Select

Comments

Post a Comment

Popular posts from this blog

c# - How to capture HTTP packet with SharpPcap -

-
I would like to capture all incoming HTTP packets on my machine. To do this, I am using SharpPcap which is a WinPcap The cover is. SharpPcap works very well, but it captures TCP packets and what it wants to do for me is a very low level. Does anyone know how can I easily get full HTTP requests / reactions from all these TCP packets? Thanks SharpPcap is already able to capture the packet in the same way That's what the virus does (just in the code instead of the GUI). And you can either either parse them directly or you can put them in the drive in the common .pcap file format. The steps to parse the capture are: Open a connection at any time Loop a while Or start capturing using an event callback Parsing the raw packet for the type you want If you are reading .PPP dump files In addition to calling you an offline capture reader is almost the same, there is no need to select an interface, and you can set the majority There is no need to do the modes. All st...
Read more

php - Multiple Select with Explode: only returns the word "Array" -

-
By using Wordpress I have created a multiple selection box so that users can select categories to exclude. When the page is initially loaded, I see my predefined default option. However, when I select a new value and I save ... I only see the word "Array" and have not chosen anything else? & lt; Class = "amultiple" id = "& lt; php echo $ value ['id'] ;? gt;" name = "& gt; php echo $ value ['id'] ;; gt; []" Multiple = "multiple" size = "8" & gt; & Lt ;? Php global option; Foreign currency ($ value as value $) {if (get_settings ($ value ['id']) === FALSE {$$ value ['id'] = $ value ['std']; } And {$$ value ['id'] = get_settings ($ value ['id']); }} $ Ranges = & amp; Amp; Categories ('type = post & orderbiz = name & amp; hide_empty = 1'); If ($ ranges) {$ ex_cat = implode (',', $ tt_cat_exclude); Forex Currency ($ range a...
Read more

php - jQuery AJAX Post not working -

-
I do not understand why this script does not work. It has something to do within AJAX PostScript / Function. Right now, when I submit my form, it runs php code on the same page. What it should do, send the values ​​of the form for Project_Azax.fp, then there will be a refund of success on the page which is correct or false. $ (document) .ready (function () {$ ('div # didIt'). Hide (); $ ('form [name = adminForm]'). Submit (function () ($ {'.post' ('/ project_ajax.php', {action: $ ('[name = action]') Val (), pId: $ ('[name = pId]'). Val (), name ('[Name = name]'. Val (), url: $ ('[url = url]'). Val (), summary: ('[summary = summary]'). Val ()}, Function (data) {if (data.success) {$ ('div # didIt') .Sliddown ('slow');} and {warning ('unsuccessful SA!');}}, 'Jason'); return false ;});}); What is the code for project_ajax.php below ... if ($ _ POST ['action'] == ...
Read more