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问题 I've recently come across a situation when an "empty" folder used by an application contains a .empty file. For example, an application has a folder for logs, and when there are no logs yet, this folder contains a .empty file. Even when there already are log files, this file isn't deleted. I've opened the file, and it is empty, so I assume it contains no useful information except that the file itself is present. What's the purpose of this empty file? P.S. My only guess is that this file is

问题 I know of two different ways of setting opacity in HTML: <div opacity="0.5"></div> and <div style="opacity: 0.5;"></div> I also know how to set both of those in JavaScript: div.setAttribute("opacity", 0.5); and div.style.opacity = 0.5 Are there any major differences between those two methods? Should I prefer one over the other? (I guess I should at least be consistent) 回答1: The only opacity attribute I am aware of is for use with SVGs: Example Elements The following elements can use the

问题 I'm getting ETIMEDOUT error while installing webdriver-manager updated . Find the error details as below: C:\Users\....> webdriver-manager update webdriver-manager: using global installed version 12.0.6 events.js:160 throw er; // Unhandled 'error' event ^ Error: connect ETIMEDOUT XX.XXX.XX.XXX:XXX at Object.exports._errnoException (util.js:1018:11) at exports._exceptionWithHostPort (util.js:1041:20) at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1086:14) Also when I tried to ping the

问题 Our project consists several sub application, and we are looking for a solution to implement SSO to avoid the authentication for each sub application. Suppose this is the structure of our project: authentication server(call it AS or IdP or something else) order-system product-system data-analysis-system ....... And we found that there are a lot of articles of "SSO implemented based on OAuth2" like this. In that article, we prefer to the SAML strategy because it is simple and clear, however

问题 Our project consists several sub application, and we are looking for a solution to implement SSO to avoid the authentication for each sub application. Suppose this is the structure of our project: authentication server(call it AS or IdP or something else) order-system product-system data-analysis-system ....... And we found that there are a lot of articles of "SSO implemented based on OAuth2" like this. In that article, we prefer to the SAML strategy because it is simple and clear, however

问题 I want my typescript files to be compiled on every file saving with the command tsc . How do I combine the tsc command with the command that nodemon runs in the build:live script "scripts": { "start": "npm run build:live", "build:live": "nodemon --watch '*.ts' --exec 'ts-node' app.ts", } this script causes nodemon to call itself twice or three times: "build:live": "nodemon --watch '*.ts' --exec 'ts-node app.ts & tsc'", 回答1: This looks like it will achieve what you're looking for: "start":

问题 In an app that I'm creating, I need to pass an unknown number of parameters to an unknown constructor of a class. The class (+ namespace) is a string, that is in $class. The parameters are in an array. This application will be deployed over a couple of months, so we thought we could develop it already in PHP 5.6. So I thought that the solution of this would be: $instance = new $class(...$args); This is working... But my collegues don't want to accept this, because the CI server does not

问题 Is it correct to use obj.constructor === Array to test if an object is an array as suggested here? Does it always returns correct answer compatible with Array.isArray ? 回答1: Depends, there are a few scenarios where it can return a different value, but Array.isArray will work. The Array object for one window is not the the same Array object in another window. var obj = someIframe.contentWindow.someArray; console.log(obj.constructor === Array);//false console.log(Array.isArray(obj));//true The

问题 I am trying to implement a twitter login button in a fragment in Android using Fabric. I got it to work in an activity, but cannot get it working in a fragment. Here is my TwitterFragment class (extends fragment) @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { TwitterAuthConfig authConfig = new TwitterAuthConfig(mTWITTER_KEY, mTWITTER_SECRET); Fabric.with(super.getActivity(), new Twitter(authConfig)); View view = inflater.inflate(R

问题 I am getting this following exception when I try configuring micronaut-data with inmemory h2 database and Jpa. I have been following the documentation I created the project from command line with maven as build tool. I have the following <dependency> <groupId>io.micronaut.configuration</groupId> <artifactId>micronaut-jdbc-tomcat</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>com.h2database</groupId> <artifactId>h2</artifactId> <scope>runtime</scope> </dependency>