I’ve been looking for better way of doing it recently. Associative array sounded like overkill for me. Look what I found: suffix=bzz declare prefix_$suffix=mystr …and then… varname=prefix_$suffix echo ${!varname} From the docs: The ‘$’ character introduces parameter expansion, command substitution, or arithmetic expansion. … The basic form of parameter expansion is ${parameter}. The value of … Read more
I think there is no way to find out whether a dynamic variable has a certain member without trying to access it, unless you re-implemented the way dynamic binding is handled in the C# compiler. Which would probably include a lot of guessing, because it is implementation-defined, according to the C# specification. So you should … Read more
The dynamic keyword was added, together with many other new features of C# 4.0, to make it simpler to talk to code that lives in or comes from other runtimes, that has different APIs. Take an example. If you have a COM object, like the Word.Application object, and want to open a document, the method … Read more
dynamic x = new ExpandoObject(); x.NewProp = string.Empty; Alternatively: var x = new ExpandoObject() as IDictionary<string, Object>; x.Add(“NewProp”, string.Empty);
Yes, just format your strings in the standard String.format() way. See the method Context.getString(int, Object…) and the Android or Java Formatter documentation. In your case, the string definition would be: <string name=”timeFormat”>%1$d minutes ago</string>
Create an XML layout first in your project’s res/layout/main.xml folder: <?xml version=”1.0″ encoding=”utf-8″?> <LinearLayout xmlns:android=”http://schemas.android.com/apk/res/android” android:orientation=”vertical” android:layout_width=”fill_parent” android:layout_height=”fill_parent” > <Button android:id=”@+id/addBtn” android:text=”Add New Item” android:layout_width=”fill_parent” android:layout_height=”wrap_content” android:onClick=”addItems”/> <ListView android:id=”@android:id/list” android:layout_width=”fill_parent” android:layout_height=”fill_parent” android:drawSelectorOnTop=”false” /> </LinearLayout> This is a simple layout with a button on the top and a list view on the bottom. Note that the … Read more
The short answer, or TL;DR Basically, eval is used to evaluate a single dynamically generated Python expression, and exec is used to execute dynamically generated Python code only for its side effects. eval and exec have these two differences: eval accepts only a single expression, exec can take a code block that has Python statements: … Read more
If you are happy to have a dependency upon the System.Web.Helpers assembly, then you can use the Json class: dynamic data = Json.Decode(json); It is included with the MVC framework as an additional download to the .NET 4 framework. Be sure to give Vlad an upvote if that’s helpful! However if you cannot assume the … Read more
The difference is that apply lets you invoke the function with arguments as an array; call requires the parameters be listed explicitly. A useful mnemonic is “A for array and C for comma.” See MDN’s documentation on apply and call. Pseudo syntax: theFunction.apply(valueForThis, arrayOfArgs) theFunction.call(valueForThis, arg1, arg2, …) There is also, as of ES6, the … Read more