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问题 I'm experiencing an issue with running an opencv program in Xcode. I keep getting this error: https://i.stack.imgur.com/F6Gpu.png . Xcode works with other opencv programs, so I have no idea what would be causing this issue & how I would go about fixing it. Any and all help would be greatly appreciated. 回答1: My solution was to delete /Application/Xcode.app as well as /Library/Developer and ~/Library/Developer and reinstall Xcode. Edit: The error reappeared. Not sure why. I had the Xcode-Beta

问题 I'm trying to compare two Actions. The comparison with == always returns false as does the Equals-method even though it's the same instance. My question is: Is it really not possible or am I doing it wrong? Cheers AC 回答1: You are doing it wrong. If I am to believe you, when you say "even though it's the same instance", then the following code executed through LINQPad tells me that you must be doing something wrong, or the "same instance" is incorrect: void Main() { Action a = () => Debug

问题 This question already has answers here : About closure, LexicalEnvironment and GC (3 answers) Closed 1 year ago . Consider the following example: function makeFunction() { let x = 3; let s = "giant string, 100 MB in size"; return () => { console.log(x); }; } // Are both x and s held in memory here // or only x, because only x was referred to by the closure returned // from makeFunction? let made = makeFunction(); // Suppose there are no further usages of makeFunction after this point // Let's

问题 Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 7 years ago . Improve this question CSS * { margin: 0px; padding: 0px; } html { margin: 0px; padding: 0px; } body { line-height: 1; margin: 0px; padding:0px; background:url("../images/22.jpg") scroll center top #16202C; /* box-shadow: 0 0 225px rgba(0, 0, 0, 0.45) inset; -webkit-box-shadow: 0 0

问题 My API Manager tool mandates that i should pass the Authorization Bearer access token with the websocket invocation call. They are providing samples of java code where they do that. The bearer token is set like ("Authorization", "Bearer e2238f3a-e43c-3f54-a05a-dd2e4bd4631f") .How can i do that in javascript? // HttpResponseDecoder to WebSocketHttpResponseDecoder in the pipeline. final WebSocketClientHandler handler = new WebSocketClientHandler( WebSocketClientHandshakerFactory .newHandshaker

问题 So I'm doing a select distinct which works, but I also want to add another key. $data = $this->db->command(array("distinct" => "scores","key"=>"target_user")); I need something like this: SELECT DISTINCT target_user FROM scores where seen = 1 Can it be done in mongo? 回答1: You can do it as follows by using distinct query : db.scores.distinct("target_user", {"seen":1}) Running distinct query using Aggregate Framework is shown below. Inserted following records into MongoDB. db.scores.insert(

问题 I'm trying to compare two Actions. The comparison with == always returns false as does the Equals-method even though it's the same instance. My question is: Is it really not possible or am I doing it wrong? Cheers AC 回答1: You are doing it wrong. If I am to believe you, when you say "even though it's the same instance", then the following code executed through LINQPad tells me that you must be doing something wrong, or the "same instance" is incorrect: void Main() { Action a = () => Debug

问题 So I'm doing a select distinct which works, but I also want to add another key. $data = $this->db->command(array("distinct" => "scores","key"=>"target_user")); I need something like this: SELECT DISTINCT target_user FROM scores where seen = 1 Can it be done in mongo? 回答1: You can do it as follows by using distinct query : db.scores.distinct("target_user", {"seen":1}) Running distinct query using Aggregate Framework is shown below. Inserted following records into MongoDB. db.scores.insert(

问题 I've been stuck for a while trying to make a webpack build for my cloud functions files. My project structure: ROOT - FUNCTIONS - DIS - bundle.js // THIS SHOULD BE GENERATED BY WEBPACK - SRC - myCloudFunction.js // SOURCE CODE FOR A CLOUD FUNCTION - entryPoint.js // ENTRY POINT FOR WEBPACK - index.js - package.json - SRC - App.js .babelrc firebase.json webpack.prod.js // THIS BUILDS FOR CLIENT (WORKING FINE) webpack.server.js // THIS SHOULD BUILD FOR THE SERVER (NOT WORKING) My goal is: Write

问题 I've been stuck for a while trying to make a webpack build for my cloud functions files. My project structure: ROOT - FUNCTIONS - DIS - bundle.js // THIS SHOULD BE GENERATED BY WEBPACK - SRC - myCloudFunction.js // SOURCE CODE FOR A CLOUD FUNCTION - entryPoint.js // ENTRY POINT FOR WEBPACK - index.js - package.json - SRC - App.js .babelrc firebase.json webpack.prod.js // THIS BUILDS FOR CLIENT (WORKING FINE) webpack.server.js // THIS SHOULD BUILD FOR THE SERVER (NOT WORKING) My goal is: Write