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问题 I have a section of code which is a bottleneck in a C++ application running on x86 processors, where we take double values from two arrays, cast to float and store in an array of structs. The reason this is a bottleneck is it is called either with very large loops, or thousands of times. Is there a faster way to do this copy & cast operation using SIMD Intrinsics? I have seen this answer on faster memcpy but doesn't address the cast. The simple C++ loop case looks like this int _iNum; const

问题 We're trying to connect to an API (.net core 2.2) from react-native (version 0.59), via localhost, both apparently running on the same ip, different ports, react-native on port 8080, and the api on the 44344, the issue happens the moment we fetch the url from react-native We’ve also tested running the url from Postman and everything seems ok, also from any of the web browser installed (safari/chrome), even we tested the browser INSIDE react-native iOS, and it works. Any api running outside

问题 I thought the below command would switch bundler installation, but it actually raised an error. $ bundle _1.10.6_ -v Could not find command "_1.10.6_". $ bundle -v Bundler version 1.13.6 $ gem list | grep bundle bundler (1.13.6, 1.10.6) What should I do? 回答1: To use different gem versions, you could use this pattern: your-gem _version_ . For example, bundle _1.10.6_ -v . Hope that will help. 来源： https://stackoverflow.com/questions/41500197/how-to-switch-bundler-version

问题 I have a rails project which uses twitter bootstrap and sass. The scss files are structured into folders so I have a better overview. Now I want to define a file for global variables which contains my colors etc. and pass those values down to other files so I have less redundant code. While all code is properly imported and applied, variables don't work. Here is the current setup: stylesheets/application.css.scss /* *= require_self *= require_tree */ /* stylesheets/ | |– base/ | |– _reset

问题 Some of model properties has "Required" data annotation, that I need to read in a TagHelper class. public partial class Sale { [Required] public string CustomerId { get; set; } ... In the sales view I create a custom select for customer: <customer asp-for="CustomerId " value="@Model.CustomerId"></customer> And in the CustomerTagHelper class there is the process method: public override void Process(TagHelperContext context, TagHelperOutput output) { How can I discover at this point, if the

问题 We're trying to connect to an API (.net core 2.2) from react-native (version 0.59), via localhost, both apparently running on the same ip, different ports, react-native on port 8080, and the api on the 44344, the issue happens the moment we fetch the url from react-native We’ve also tested running the url from Postman and everything seems ok, also from any of the web browser installed (safari/chrome), even we tested the browser INSIDE react-native iOS, and it works. Any api running outside

问题 Supposed I have a single page application that uses JWT tokens to authenticate against a backend REST api. I transfer the JWT token inside the http header when doing a REST request. So far, so good. Now, supposed I want to download an image from the server, and I want the image only to be accessible for authenticated users. On the server, this is no problem: Simply define a route that delivers the image, and in that route verify the JWT token. But: How do I transfer the token from the client

问题 When i run the following program it prints only equals says they are equal However From equalsIgnoreCase docs in java 8 we have : Two characters c1 and c2 are considered the same ignoring case if at least one of the following is true: • Applying the method java.lang.Character.toUpperCase(char) to each character produces the same result public class Test { public static void main(String[] args) { String string1 = "abc\u00DF"; String string2 = string1.toUpperCase(); if (string1.equalsIgnoreCase

问题 I have an installer that installs few components including windows service, after it installed it'll start the service that installed onto the system using CustomAction. The problem when I uninstall the application, the installer asks to close the application before continue. I created a custom action that will stop the service, and I scheduled it with Uninstall actions. But its not executed until I press OK for the error dialog after manually stop the service. It failed on Win7, but I tested

问题 I have a rails project which uses twitter bootstrap and sass. The scss files are structured into folders so I have a better overview. Now I want to define a file for global variables which contains my colors etc. and pass those values down to other files so I have less redundant code. While all code is properly imported and applied, variables don't work. Here is the current setup: stylesheets/application.css.scss /* *= require_self *= require_tree */ /* stylesheets/ | |– base/ | |– _reset