closures

I am making a game in HTML5, and now I just got a disturbing problem. In my game I have an Array with all the particles, all the particles have expire-timers, with different random generated delays. When the expire-timers expire they delete there own Object with the Array.splice() function, that causes trouble, since the Array.splice() function will mess up the order of the Array. First I had the function like this: (n = Blood particles to spawn, and x and y = starting point.) (All particles is spread random directions from the middle, and then they are decelerated by friction) function

I have this JavaScript code: for (var idx in data) { var row = $("<tr></tr>"); row.click(function() { alert(idx); }); table.append(row); } So I'm looking through an array, dynamically creating rows (the part where I create the cells is omitted as it's not important). Important is that I create a new function which encloses the idx variable. However, idx is only a reference, so at the end of the loop, all rows have the same function and all alert the same value. One way I solve this at the moment is by doing this: function GetRowClickFunction(idx){ return function() { alert(idx); } } and in the

To add javascript, you can use: drupal_add_js And similar for css: drupal_add_css But what if I just want to add html at the end of my page. I.e. Add a div with some text in it at the end of the page? A lot of suggestions here work if you want your alteration to be theme-based, but if you want this to come from a module, using a block region, page template or page prepocess won't cut it, because you're tying the alteration to the theme. From a modular standpoint, the following options are best: hook_footer() -- http://api.drupal.org/api/function/hook_footer/6 :: my_module_footer() should

With C++11, we get lambdas, and the possibility to create functions/functors/closures on-the-fly where we actually need them, not somewhere where they don't really belong. In C++98/03, a nice way to make function-local functors/closures would've been the following: struct{ void operator()(int& item){ ++item; } }foo_functor; some_templated_func(some_args, foo_functor); Sadly, you can't use local types for templates (Visual Studio allows this with language extensions enabled). My train of though then went the following way: struct X{ static void functor(int& item){ ++item; } }; some_templated