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What does default(object); do in C#?
... worth making it explicit)
The biggest use of default(T) is in generics, and things like the Try... pattern:
bool TryGetValue(out T value) {
if(NoDataIsAvailable) {
value = default(T); // because I have to set it to *something*
return false;
}
value = GetData();
re...
How to override equals method in Java
... in Java. I have a class People which basically has 2 data fields name and age . Now I want to override equals method so that I can check between 2 People objects.
...
What is your favorite C programming trick? [closed]
...[] = {
#include "normals.txt"
};
(more or less, I don't have the code handy to check it now).
Since then, a new world of creative use of the preprocessor opened in front of my eyes. I no longer include just headers, but entire chunks of code now and then (it improves reusability a lot) :-p
Tha...
ListView inside ScrollView is not scrolling on Android
... ScrollView . I have an Activity which has some EditTexts in the top part and then a tab host with two tabs which have one ListView each. When the EditText views are focused, the soft keyboard comes up and as I have a ScrollView, the content is scrollable. But the problem comes when there are more...
Why does struct alignment depend on whether a field type is primitive or user-defined?
...ot supposed to happen.
You can see it by making the struct members public and appending test code like this:
var test = new RefAndTwoInt32Wrappers();
test.text = "adsf";
test.x.x = 0x11111111;
test.y.x = 0x22222222;
Console.ReadLine(); // <=== Breakpoint here
When the...
Why are only final variables accessible in anonymous class?
...update the variable in a way which is seen by the main body of the method, and vice versa.)
As the value has been copied into the instance of the anonymous inner class, it would look odd if the variable could be modified by the rest of the method - you could have code which appeared to be working w...
File Upload in WebView
I have been struggling to upload files from WebView since last few
days and there is no progress. I googled and implemented all suggested
solutions but none works, like: solutions suggested here ,
and so on.
...
Why doesn't Java support unsigned ints?
...
This is from an interview with Gosling and others, about simplicity:
Gosling: For me as a language designer, which I don't really count myself as these days, what "simple" really ended up meaning was could I expect J. Random Developer to hold the spec in his h...
Simultaneously merge multiple data.frames in a list
... issue here is that each data.frame differs in terms of the number of rows and columns, but they all share the key variables (which I've called "var1" and "var2" in the code below). If the data.frames were identical in terms of columns, I could merely rbind , for which plyr's rbind.fill would...
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 13: ordinal not in range(128)
... as a bunch of strs, but it should be unicodes. Python tries to implicitly convert, but fails. Change:
job_titles = [line.strip() for line in title_file.readlines()]
to explicitly decode the strs to unicode (here assuming UTF-8):
job_titles = [line.decode('utf-8').strip() for line in title_file....