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Can I change a private readonly field in C# using reflection?
...mplementation today does not mean that you can on every implementation for all time. I am not aware of any place where we document that readonly fields must be mutable via reflection. As far as I know, a conforming implementation of the CLI is perfectly free to implement readonly fields such that th...
Fragment in ViewPager using FragmentPagerAdapter is blank the second time it is viewed
...r me too. Here is a link. It seems to save the fragment state, which makes all the difference. developer.android.com/reference/android/support/v4/app/…
– Tjaart
Jan 28 '14 at 12:04
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Declaring an unsigned int in Java
... however, are different. As of Java SE 8, new methods in the Integer class allow you to fully use the int data type to perform unsigned arithmetic:
In Java SE 8 and later, you can use the int data type to represent an unsigned 32-bit integer, which has a minimum value of 0 and a maximum value of...
Time complexity of Sieve of Eratosthenes algorithm
...oose upper-bound is n(1+1/2+1/3+1/4+1/5+1/6+…1/n) (sum of reciprocals of all numbers up to n), which is O(n log n): see Harmonic number. A more proper upper-bound is n(1/2 + 1/3 + 1/5 + 1/7 + …), that is sum of reciprocals of primes up to n, which is O(n log log n). (See here or here.)
The "find...
Using pre-compiled headers with CMake
...bout hacking together some support for pre-compiled headers in CMake. They all seem a bit all-over the place and everyone has their own way of doing it. What is the best way of doing it currently?
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Create a string of variable length, filled with a repeated character
...slower than a string-concatenation-based implementation. It performs especially badly on large strings. See below for full performance details.
On Firefox, Chrome, Node.js MacOS, Node.js Ubuntu, and Safari, the fastest implementation I tested was:
function repeatChar(count, ch) {
if (count == ...
Append an object to a list in R in amortized constant time, O(1)?
...irthday. Some kind readers keep repeating any shortcomings with it, so by all means also see some of the comments below. One suggestion for list types:
newlist <- list(oldlist, list(someobj))
In general, R types can make it hard to have one and just one idiom for all types and uses.
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How can I turn a List of Lists into a List in Java 8?
...ct>> , how can I turn that into a List<Object> that contains all the objects in the same iteration order by using the features of Java 8?
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How do you test private methods with NUnit?
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Generally, unit testing addresses a class's public interface, on the theory that the implementation is immaterial, so long as the results are correct from the client's point of view.
So, NUnit does not provide any mechanism for t...
Access parent DataContext from DataTemplate
... this exact code in my project but it's leaking ViewModels (Finalizer not called, Command binding seems to retain DataContext). Can you verify that this issue exists for you as well?
– Joris Weimar
Jan 22 '13 at 11:05
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