options

问题 I'm currently making a function that returns an object. But If i find something invalid in the input I want to return something to indicate that problem. I just can not wrap my head around on working this out.. What is the correct way to handle errors here? Using Options? But returning None does not specify any specific problems. Am i getting something wrong?:) case class myClass(value: Int) def myFunction(input: Int) : myClass { //return myClass if succeded //else return some error - what do

问题 I am trying to start an activity from an options menu, but my app keeps crashing. The only error that I receive is an ActivityThread.performLaunchActivity(ActivityThread$ActivityRecord,Intent) error in the debug window in Eclipse. Below is the the code that I am using at the moment, but keep in mind I have tried multiple options, all of which end in the same misery, at the same piece of code - the startActivity statement (discovered by using breakpoints, since I'm not sure how to see the

问题 I want something similar to Mysql's sorting of data, but in jquery. I have an input and a select tag, like this - I want the select options to be filtered and sorted depending on the input text's value. Filtration OR logic to be applied on the input text and all those options to be kept which contain at least one word Sorting/Grouping then sort the remaining options by number of matches, such that options containing all the words as in the input appear at the top, followed by those with one

问题 I would like to know how to prevent the menu bar from closing. @Override public void onOptionsMenuClosed(Menu menu) { } When the activity starts I open the menu and want it to stay open. new Handler().postDelayed(new Runnable() { public void run() { openOptionsMenu(); } }, 1000); 回答1: You cannot keep the Options Menu open and it will always act that way. But what you can do is create your own custom menu in a layout.xml and set the visibility to GONE. Then, override the onKeyDown() method and

问题 I have a tag with many child nodes. I want to keep the width of this drop-down list to a minimum size. However, there are times when the innerHTML of at least one option is very long, forcing the drop-down list box to expand its width. What I'm planning to do is to truncate the long text and use ellipses to denote that some characters have been truncated ("very loooooong sentence" becomes "very loooooo.."). In order to show the full text, I'm thinking of using tooltip message on mouse over

问题 The Generate Serialization Assemblies option in Visual Studio creates a MyAssembly.XmlSerializers.dll when my project is built. This question (https://stackoverflow.com/questions/934411/what-is-myassembly-xmlserializers-dll-generated-for) indicates a reason why it's there in the first place, and some of the answers provide ways to turn it off, but my question is why would you choose to turn it off? Does having it turned on cause problems in certain situations (and, if so, what are those

问题 I want to be able to get some wordpress options with the shortcode from the post, something like this: [get_option posts_per_page] Is there an easy way to do that? 回答1: I think it is pretty easy first, create a function that will handle the short code function handle_shortcode($para){ //get_options } secord, register the shortcode add_shortcode('getOption', 'handle_shortcode'); then, use it in a post: [getOption para="key"] more details look at here: http://codex.wordpress.org/Shortcode_API

问题 Whick is the best way to POST, PUT and DELETE from Backbone app to Rails app on different subdomains? I have tried to fetch some data with Backbone from the Rails app and it works. I have tried to save new content with Backbone to Rails app. I have real problems with PUT (updating a created model in database). I don't know why, but when I do in my backbone app something like: book.save() And the book is a model that already existis on the database, instead of sendind a PUT petition to the

问题 I am using a AutoCompleteTextView in my code and loading the list from database using SimpleCursorAdapter. AutoCompleteTextView cocktailIngredientView = (AutoCompleteTextView) findViewById(R.id.item); SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, android.R.layout.simple_spinner_item, mCursor, new String[] { "field" }, new int[] { android.R.id.text1 }); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); cocktailIngredientView.setAdapter(adapter);

问题 I was looking at FireBug Lite and saw that they use a pretty cool technique to pass options into an external script file. <script type="text/javascript" src="https://getfirebug.com/firebug-lite.js"> { overrideConsole: false, startInNewWindow: true, startOpened: true, enableTrace: true } </script> I was wondering if anyone know of the name of this technique and where I can find more info about it or how it works. Seems pretty cool. Thanks! 回答1: It's not an automatic variable-passing-technique