dry

问题 My boss told me make dry navigation dont use repetitive code, for navigation i am trying to extend CI_Controler and with construct load header nav, body, footer files. My question is when i create new controller and when i try to load different view files, how to achive that??? my extended controler class MY_Controller extends CI_Controller { public function __construct() { parent::__construct(); $this->load->view('view_header'); $this->load->view('includes/nav_home'); $this->load->view('view

问题 How can you specify choices on a django model such that the "choice" carries more information than just the database value and display value (as required by django's choices spec)? Suppose the different choices have a number of config options that I want to set (in code) as well as some methods, and the methods may be different between different choices. Here's an example: class Reminder(models.Model): frequency = models.CharField(choices=SOME_CHOICES) next_reminder = models.DateTimeField() .

问题 I am aware of the FAQ entry for PyLint which states that: 4.2 Is there a way to disable a message for a particular module only? Yes, you can disable or enable (globally disabled) messages at the module level by adding the corresponding option in a comment at the top of the file: # pylint: disable=wildcard-import, method-hidden # pylint: enable=too-many-lines However, how can I locally suppress a message and then simply restore the previous state, prior to suppression. I don't want to have to

问题 I'd like to adhere to the Don't-Repeat-Yourself principle, but sometimes when I write PHP together with HTML and CSS, if I re-use the same code for different situations, my code soon will have so many if-then-else that the code is not easily maintainable. This may be a bigger issue if Smarty, the templating engine is used, because most code editor won't match up {if} {else} {/if} So the programmer needs to look for the matching tag visually, and is not easy when there are 3 or 4 levels of

问题 I want to search every page of a site. My thought is to find all links on a page that stay within the domain, visit them, and repeat. I'll have to implement measures to not repeat efforts as well. So it starts very easily: page = 'http://example.com' nf = Nokogiri::HTML(open(page)) links = nf.xpath '//a' #find all links on current page main_links = links.map{|l| l['href'] if l['href'] =~ /^\//}.compact.uniq "main_links" is now an array of links from the active page that start with "/" (which

问题 Consider the following code: hash1 = {"one" => 1, "two" => 2, "three" => 3} hash2 = hash1.reduce({}){ |h, (k,v)| h.merge(k => hash1) } hash3 = hash2.reduce({}){ |h, (k,v)| h.merge(k => hash2) } hash4 = hash3.reduce({}){ |h, (k,v)| h.merge(k => hash3) } hash4 is a 'nested' hash i.e. a hash with string keys and similarly 'nested' hash values. The 'symbolize_keys' method for Hash in Rails lets us easily convert the string keys to symbols. But I'm looking for an elegant way to convert all keys

问题 Given the following linq-query: var query1 = dbContext.MainTable.Where(m => m.MainId == _mainId).SelectMany(sub => sub.SubTable1) .Select(sub1 => new { sub1.CategoryName, VisibleDivisions = sub1.SubTable2 .Where(sub2 => sub2.Status == "Visible") .Select(sub2 => new { /* select only what needed */ }) }); Starting from my main-table, I want to get all sub1's selected together with all the sub2's related to the sub1. The query works as expected, generating a single query which will hit the

问题 This question already has an answer here : Closed 8 years ago . Possible Duplicate: Why doesn't this code produce the desired result? I have the code: def check_beta_code beta_code_array = ['AAAAAAAAAA', 'BBBBBBBBBB', 'CCCCCCCCCC', 'DDDDDDDDDD', 'EEEEEEEEEE'] beta_code_array.each do |code| if :beta_code != code errors.add(:beta_code, "Invalid Beta Code") end end end The problem with this code is that even if someone inputs a correct password, 4 errors are still generated because the other 4

问题 As a simplified example, consider a ListView that can contain both sub-categories and book titles. If a book title is clicked, a new activity should start that shows the cover image. If a sub-category is clicked, a new list of books and categories is displayed. A Row interface is defined as follows. interface Row { void onClick(); void draw(View v); } I would like to know how to prevent a dependency from the ListView 's ArrayAdapter as well as from the implementer of onItemClickListener on

问题 A number of Rails views in our application populate themselves via AJAX, and the first rendering of their data comes from an javascript call that runs on jquery's $(document.ready) event. The views we are interested in for this essentially show a list of tabular data (e.g. an inbox, a list of search results, and so on). We want to pre-render the first page of results without having to make the AJAX call, but we want to be able to re-populate the view without reloading the whole page. This isn