dynamic

问题 I have an object A1 of type A. I dynamically find that out , that object A1 is of type A. I now have a property say "Name" which I want to access from A1 , how do I do it ? Now the biggest problem is that the object A1 can even be of type B. If it is of type B then I will have to obtain the value "Address". Now How I resolve this ? Below code does the type check , public static void testing(Object A1, String s) s - Classtype { try{ Class c = Class.forName(s); if( c.isInstance(A1)) // { //Now

问题 I was using and if statement to append $query .= "AND column LIKE $suchandsuch" in my search engine when I had it set up with mysqli, but I'm updating it to PDO and am struggling to figure out how to make sure it will ignore the fields that are left blank. The form fields are: condition, degree, specialty, city, state. Condition is required, but nothing else is, so it needs to ignore those fields when they're empty. I feel like this should be obvious but I'm new to PDO and stumped. if(isset($

问题 I am trying to select a checkbox whose ids are generated dynamically but couldn't solve it. Tried following Selenium.check("id=regexp:ctl00_cphMain_cbx_[a-zA-Z0-9_,]*") Selenium.check("xpath=(//input[@type='checkbox'])[position()=1]") Also this check box has only dynamic id, no name etc. any idea what I am doing wrong. Regards 回答1: have you tried selenium.check('xpath=//input[@type='checkbox' and starts-with(@id,'ctl00_cphMain_cbx_')]) That should get what you are after 来源： https:/

问题 I have a basic unordered list with an input field/form below it. I would like the user to be able to type in the total number of list items they would like to see and on click, the results would show. Here is my HTML: <div id="boxes"> <div class="box1"></div> <div class="box1"></div> <div class="box1"></div> <div class="box1"></div> <div class="box1"></div> </div> <form id="four" action="#"> <input type="text" placeholder="Type items per page"></input> <button>Submit</button> </form> And my

问题 I am finishing up a game that I developed using Java3D. Since Java3D does not come with the standard JRE, all of the people who I am giving this game to will have to download Java3D. Some of my friends are a little less computer savvy so I thought it would be a lot less work to just write the Jars to the disk and dynamically load them in Java. Is there a better solution to this? Or is dynamically loading the Jars the way to go? I have installed Java3D on another computer of mine from here:

问题 How do I do a memset for a pointer to an array? int (*p)[2]; p=(int(*))malloc(sizeof(*p)*100); memset(p,0,sizeof(*p)*100); Is this allocation an correct? 回答1: you can use calloc . calloc will replace both malloc and memset . p = calloc(100, sizeof (*p)); 回答2: I'll summarize a lot of answers (although I've ignored some of the stylistic variants in favor of my own preferences). In C: How to use malloc: int (*p)[2] = malloc(100 * sizeof(*p)); How to use memset: memset(p, 0, 100 * sizeof(*p));

问题 Tensorflow supports dynamic length sequence by use of the parameter: 'sequence_length' while constructing the RNN layer, wherein the model does not learn the sequence after the sequence size = 'sequence_length' i.e, returns zero vector. However, how can the cost function at https://github.com/tensorflow/tensorflow/blob/master/tensorflow/python/ops/seq2seq.py#L890 be modified to encounter the masked sequences, so that cost and perplexity are calculated only on the actual sequences rather than

问题 In the codepen below I have a Element-UI datepicker set up to show a dynamic disabled dates based on a random number. The number of disabled dates change every time the datepicker input comes into focus. My issue is the datepicker doesn't refresh the disabled dates until you click on a different month. The datepicker also shows the last month you were previously on when when you click off and back in. Is there a way to force Element-UI Datepicker to refresh? I would like to make the

问题 Hello heroes of Stack overflow, SHORT SUMMARY: App works great, until you change the entered number in the input field. UI re-renders great, but server side fails on stuff still in the memory it seems. Detailed explanation below: I have a nicely working dynamic app, but I'm still dealing with a few bugs and one core problem. The problem must be somewhere in the reactivity but I'm having a lot of difficulty to figure out what it is that Im doing wrong. I've tried dozens of things already, and

问题 Can I somehow utilize the App_code folder in a web application project to compile code on the fly? It'd be great for plugins. Recently Rob Conery demonstrated its use in his talk at MIX 09 in a ASP.NET MVC app. I tried to do the same in a web app but I can't access the classes under App_Code from anywhere else. But if Rob was able to do it in an MVC app, it should be doable in a web application too. After all ASP.NET MVC IS a ASP.NET Web Application under the covers. 回答1: If you add a code