conditional-statements

问题 I am trying to create a setup file for my solution in VS2010. It's a C# application. So far it does whatever I need. However, I do some Interop stuff and this setup file shouldn't be run unless some Native DLLs exist on the system. I tried using the "File Search" Launch Condition type to try and find this file before I launch the installer, but it only seems to work for the special folders it lists in the combo box in the "Folder" Property for the File Search Launch Condition. Is there any

问题 This Python 3 based function returns if a triangle is or isn't right-angled given side lengths x, y, and z. I'm having an issue simplifying the conditional statement. Should this function check for acute, right, obtuse, scalene, isosceles, and equilateral angles, or are there conditions I can skip? Any feedback is appreciated. def right_angled(x, y, z): """This function returns if a triangle is or isn't right-angled given side lengths x, y, and z.""" p = x + y + z #triangle perimeter a_sym =

问题 Grouping the following data in 64 groups. I have two variables x and y for each object. I would like to group them up based on a condition. Both x and y have a range between 0 and 2000 and I want to break them into 64 groups. The first one to have x<250 and y<250 the next one 250 Sample data: index x y 1 10 100 2 270 60 3 550 1000 4 658 1900 5 364 810 6 74 1890 ... 6000 64 71 Could you please tell me a way to do it? I have my data now as a data frame but I do not know if it the way to go. I

问题 I'm trying to define a bivariate function that takes values depending on whether a condition is met. I make them work for univariate case but I'm stuck with the bivariate case: g[x_, y_] := 10 /; x < 10 g[x_, y_] := 20 /; (x >= 10 && y < 5) g[x_, y_] := -5 /; (x >= 10 && y >= 5); This function never gives me the value of -5. g[12,10] = 20? 回答1: This works for me: Clear[g] g[x_, y_] /; x < 10 := 10 g[x_, y_] /; x >= 10 \[And] y < 5 := 20 g[x_, y_] /; x >= 10 \[And] y >= 5 := -5 then In[73]:= g

问题 I want to do the following PHP statement within function.php : If there's an uploaded image for #header h1 a 's background, indent the text (remove)...If not (else), keep the text (don't indent it). I'm not very familiar with PHP but this is what I did: <?php // Include functions of Theme Options require_once(TEMPLATEPATH . '/functions/admin-menu.php'); // If there's an image for the site title, remove it's text function logo_exists() { ?><style type="text/css"> #header h1 a { <?php if (

问题 Laravel 5 How to give user access to specific route when certain conditions are met? For example let user access Route::get(view('posts/{id}'),'PostsController@show'); when user has over 100 points in his user->points column. 回答1: You can use Middleware for this,In Laravel it is very easy to secure your routes by creating your own middlewares. The following steps are required to do this: run command php artisan make:middleware Middlewarename and you'll find your middleware inside app/Http

问题 I would like to generate combinations with length 9 out of a sorted list (length 150) without any repeated values: 24, 110, 157, 256, 278, 368, 416, 502, 593, 666, 751, 801, 827, 925, 991, 1044, 1118, 1159, 1203, 1296, 1375, 1479, 1546, 1621, 1679, 1695, 1726, 1832, 1922, 1978, 1995, 2041, 2119, 2160, 2240, 2315, 2421, 2493, 2527, 2543, 2559, 2654, 2762, 2813, 2883, 2950, 2982, 3009, 3052, 3103, 3162, 3239, 3346, 3427, 3462, 3480, 3548, 3638, 3670, 3761, 3833, 3898, 3946, 3979, 4051, 4096,

问题 Few days back I created this post , to seek any solution as to how I can let my script loop in such a way so that the script will use few links to check whether my defined title (supposed to be extracted from each link) is nothing for four times. If the title is still nothing then the script will break the loop and go for another link to repeat the same. This is how I got success--► By changing fetch_data(link) to return fetch_data(link) and defining counter=0 outside while loop but inside if

问题 Is it possible to use an include statement that contains conditional statements in a control structure? It's hard to explain, so here's an example: if (...) { } elseif (...) { } elseif (...) { } elseif (...) { } else { } Let's say my third elseif contained a lot of code and I wanted to put it in another file and use an include statement instead. Could I do that? When I tried to, it was giving my an "unexpected T_ELSE" error. So it would be something like this: if (...) { } elseif (...) { }

问题 Is there a way to abbreviate the following type of condition in Swift? if ( (myEnum == .1 || myEnum == .2 || myEnum == .3 || myEnum == .8) && startButton.isSelected ) I tried typing: if ( (myEnum == .1 || .2 || .3 || .8) && startButton.isSelected ) and: if ( (myEnum == .1,.2,.3,.8) && startButton.isSelected ) but none of those worked. I also tried looking at documentation but can't find a similar example. Thanks! 回答1: I don't think there is a way to abbreviate it like you want but there is,