If a device has an SD card, you use: Environment.getExternalStorageState() If you don’t have an SD card, you use: Environment.getDataDirectory() If there is no SD card, you can create your own directory on the device locally. //if there is no SD card, create new directory objects to make directory on device if (Environment.getExternalStorageState() == null) … Read more
UPDATE: This question was the subject of my blog in September 2014. Thanks for the great question! There is considerable debate on this question even within the compiler team itself. First off, it’s wise to understand the rules. A public member of a class or struct is a member that is accessible to anything that … Read more
See section 10.4 of the C# spec for the rules here: when a class is initialized, all static fields in that class are first initialized to their default values, and then the static field initializers are executed in textual order. Likewise, when an instance of a class is created, all instance fields in that instance … Read more
Basically, with git, every merge is a conflict, which leaves you with an index that contains three versions of each file, the versions from each branch and the base. On this index, various resolvers are run, which can decide for each individual file how to resolve the matter. The first stage is a trivial resolver, … Read more
isn’t this illegal in C#? If “int” is only alias for “Int32” it should fail to compile with error CS0523. Is there some magic in the compiler? Yes; the error is deliberately suppressed in the compiler. The cycle checker is skipped entirely if the type in question is a built-in type. Normally this sort of … Read more
You should use factors. Yes they can be a pain, but my theory is that 90% of why they’re a pain is because in read.table and read.csv, the argument stringsAsFactors = TRUE by default (and most users miss this subtlety). I say they are useful because model fitting packages like lme4 use factors and ordered … Read more
The purpose of the config() function is to allow you to perform some global configuration that will affect the entire application – that includes services, directives, controllers, etc. Because of that, the config() block must run before anything else. But, you still need a way to perform the aforementioned configuration and make it available to … Read more
In MRI the object_id of an object is the same as the VALUE that represents the object on the C level. For most kinds of objects this VALUE is a pointer to a location in memory where the actual object data is stored. Obviously this will be different during multiple runs because it only depends … Read more
Utility or helper classes/methods that you would like to access from many other classes within the same assembly, but that you want to ensure code in other assemblies can’t access. From MSDN (via archive.org): A common use of internal access is in component-based development because it enables a group of components to cooperate in a … Read more
Summary: Git’s pack files are carefully constructed to effectively use disk caches and provide “nice” access patterns for common commands and for reading recently referenced objects. Git’s pack file format is quite flexible (see Documentation/technical/pack-format.txt, or The Packfile in The Git Community Book). The pack files store objects in two main ways: “undeltified” (take the … Read more