anonymous-function

I know you can create an anonymous function, and have the compiler infer its return type: val x = () => { System.currentTimeMillis } Just for static typing's sake, is it possible to specify its return type as well? I think it would make things a lot clearer. In my opinion if you're trying to make things more clear it is better to document the expectation on the identifier x by adding a type annotation there rather than the result of the function. val x: () => Long = () => System.currentTimeMillis Then the compiler will ensure that the function on the right hand side meets that expectation. val

I've been searching the net for a couple of mornings and found nothing, hope you can help. I have an anonymous function like this f = @(x,y) [sin(2*pi*x).*cos(2*pi*y), cos(2*pi*x).*sin(2*pi*y)]; that needs to be evaluated on an array of points, something like x = 0:0.1:1; y = 0:0.1:1; w = f(x',y'); Now, in the above example everything works fine, the result w is a 11x2 matrix with in each row the correct value f(x(i), y(i)). The problem comes when I change my function to have constant values: f = @(x,y) [0, 1]; Now, even with array inputs like before, I only get out a 1x2 array like w = [0,1];

I have an anonymous functions that I now need to update to be compatible with PHP 5.2. The function (below) takes text and uppercases the first letter of every sentence. function clean_text($input) { $output = $input; $output = preg_replace_callback('/([.!?])\s*(\w)/', function ($matches) { return strtoupper($matches[1] . ' ' . $matches[2]); }, ucfirst(strtolower($input))); return $output; } I tried pulling the function out, but I'm receiving an error stating that argument 2 in the callback is now missing. Any ideas on how to resolve this? function clean_text($input) { function upper_case(

Mailcore has a cool method that downloads an attachment and accepts a block as a parameter to return download progress: - (CTCoreAttachment *)fetchFullAttachmentWithProgress:(CTProgressBlock)block; where CTProgressBlock is defined as typedef void (^CTProgressBlock)(size_t curr, size_t max); so typically I would use it like so: //AttachmentDownloader.m int fileNum = x; // explained later CTCoreAttachment* fullAttachment = [attachment fetchFullAttachmentWithProgress:^(size_t curr, size_t max) { NSLog(@"::: this is curr: %zu", curr); NSLog(@"::: this is max: %zu\n\n", max); }]; the problem is

I'm trying to get a simple sort function going using anonymous functions. One each for asc and desc sorting. Is it possible to render the $sortBy variable right away when the function is created, but still have $x and $y passed in when called later? I want to be able to dynamically pass in a key when creating these. $sortBy = 'some_key'; // descending $sort['desc'] = function($x, $y) { if($x['data'][$sortBy] == $y['data'][$sortBy]) return 0; return ($x['data'][$sortBy] > $y['data'][$sortBy]) ? -1 : 1; }; uasort($arrayToSort, $sort[$order]); EDIT: I'm passing this array as a param to uasort().

Consider the following code: MyClass.prototype.my_func = function () { this.x = 10; $.ajax({ // ... success: function (data) { alert(this.x); } }); } It doesn't work, since apparently this is not bound into the closure's execution context. I've been able to work it around by introducing another variable: var _this = this; And this works inside the anonymous function. But looks quite ugly to me. Is there some nice way to handle this? This may look like the ugly solution for you and there are some walkarounds (such as using bind() method to change the context), but this is the best solution I