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Can lambda functions be templated?
...me with templated and conceptualized lambdas. The feature has already been integrated into the standard draft.
UPDATE 2014: C++14 has been released this year and now provides Polymorphic lambdas with the same syntax as in this example. Some major compilers already implement it.
At it stands (i...
Merging dictionaries in C#
...you'll get a lookup which can have multiple values per key. You could then convert that to a dictionary:
var result = dictionaries.SelectMany(dict => dict)
.ToLookup(pair => pair.Key, pair => pair.Value)
.ToDictionary(group => group.Key,...
How to call a method with a separate thread in Java?
...
Create a class that implements the Runnable interface. Put the code you want to run in the run() method - that's the method that you must write to comply to the Runnable interface. In your "main" thread, create a new Thread class, passing the constructor an instance of...
Is there any advantage of using map over unordered_map in case of trivial keys?
...( amortized O(1) vs. O(log n) ). Most times I use a map, I use either int or std::string as the key type; hence, I've got no problems with the definition of the hash function. The more I thought about it, the more I came to realize that I can't find any reason of using a std::map over a s...
Why is there no Char.Empty like String.Empty?
... I am asking because if you needed to use lots of empty chars then you get into the same situation as you would when you use lots of empty strings.
...
Create a unique number with javascript time
...r case I got into trouble very fast because of toString(36) which I assume converts numerical value to it's ascii representation, not sure though, but i can see the problem, if you call your uuid generator often enough, only last 3 chars are changing so the chances are high that you will get into a ...
How to present popover properly in iOS 8
...
Here i Convert "Joris416" Swift Code to Objective-c,
-(void) popoverstart
{
ViewController *controller = [self.storyboard instantiateViewControllerWithIdentifier:@"PopoverView"];
UINavigationController *nav = [[UINavigation...
UnicodeDecodeError when reading CSV file in Pandas with Python
...e to use Latin1 encoding because it accept any possible byte as input (and convert it to the unicode character of same code):
pd.read_csv(input_file_and_path, ..., encoding='latin1')
You know that most of the file is written with a specific encoding, but it also contains encoding errors. A real wo...
Create an Array of Arraylists
...e: hello.java uses unchecked or unsafe operations. Note: Recompile with -Xlint:unchecked for details.
– math
Jan 9 '17 at 13:28
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How to delete a whole folder and content?
...);
if (dir.isDirectory())
{
String[] children = dir.list();
for (int i = 0; i < children.length; i++)
{
new File(dir, children[i]).delete();
}
}
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