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What is the preferred/idiomatic way to insert into a map?
...a value. Obviously, this can be inefficient if the mapped_type can benefit from being directly initialized instead of default constructed and assigned. This method also makes it impossible to determine if an insertion has indeed taken place or if you have only overwritten the value for an previously...
What is more efficient: Dictionary TryGetValue or ContainsKey+Item?
From MSDN's entry on Dictionary.TryGetValue Method :
10 Answers
10
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Why Func instead of Predicate?
...d Array<T>, in .net 2.0, the different Func and Action variants come from .net 3.5.
So those Func predicates are used mainly for consistency in the LINQ operators. As of .net 3.5, about using Func<T> and Action<T> the guideline states:
Do use the new LINQ types Func<> an...
How can I make a Python script standalone executable to run without ANY dependency?
...ance, how would clients be able to use the ginput() function in matplotlib from the executable, without having it installed on their computer.
– chimpsarehungry
Apr 10 '13 at 18:04
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Abstract class in Java
...stract class, which then can be instantiated. To do so you have to inherit from the abstract class and override the abstract methods, i.e. implement them.
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What's “requestCode” used for on PendingIntent?
...endingIntent2 = PendingIntent.getBroadcast(context, 0, startIntent2, 0);
From above example, they will not override each other because the receiver is different(AlarmReceiverFirst and AlarmReceiverSecond)
Intent startIntent2 = new Intent(context, AlarmReceiverSecond.class);
PendingIntent pendingI...
How do I ZIP a file in C#, using no 3rd-party APIs?
...ip = ZipFile.Open("test.zip", ZipArchiveMode.Create))
{
zip.CreateEntryFromFile(@"c:\something.txt", "data/path/something.txt");
}
You need to add references to:
System.IO.Compression
System.IO.Compression.FileSystem
For .NET Core targeting net46, you need to add dependencies for
System...
Zipping streams using JDK8 with lambda (java.util.stream.Streams.zip)
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I needed this as well so I just took the source code from b93 and put it in a "util" class. I had to modify it slightly to work with the current API.
For reference here's the working code (take it at your own risk...):
public static<A, B, C> Stream<C> zip(Stream&...
How to enter in a Docker container already running with a new TTY
...service in the foreground. I would like to be able to access the container from another shell in order to "poke around" inside it and examine the files. At the moment, if I attach to the container, I am left looking at the Apache daemon and cannot run any commands.
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Where should I put tags in HTML markup?
...er attributes are not used nowhere? I mean, I viewed a lot of HTML sources from internet, and I don't see the async and defer attributes anywhere. ... ?
– john c. j.
May 10 '16 at 14:02
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