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Cannot download Docker images behind a proxy
I installed Docker on my Ubuntu 13.10 (Saucy Salamander) and when I type in my console:
25 Answers
...
Best way to create an empty map in Java
... immutable:
Collections.emptyMap()
// or, in some cases:
Collections.<String, String>emptyMap()
You'll have to use the latter sometimes when the compiler cannot automatically figure out what kind of Map is needed (this is called type inference). For example, consider a method declared like...
Can you write virtual functions / methods in Java?
...println("I eat like a generic Animal.");
}
public static void main(String[] args)
{
List<Animal> animals = new LinkedList<Animal>();
animals.add(new Animal());
animals.add(new Fish());
animals.add(new Goldfish());
animals.add(new OtherAnimal());...
What are the options for storing hierarchical data in a relational database? [closed]
...s a result, most people end up having to settle for one or the other especially if there are more than, say, a lousy 100,000 nodes or so. Using the push stack method can take a whole day to do the conversion on what MLM'ers would consider to be a small million node hierarchy.
I thought I'd give Ce...
Convert Iterable to Stream using Java 8 JDK
...r spliterator, and therefore better stream performance (maybe even good parallelism). It's also less code:
StreamSupport.stream(iterable.spliterator(), false)
.filter(...)
.moreStreamOps(...);
As you can see, getting a stream from an Iterable (see also this question) is...
How do I compile and run a program in Java on my Mac?
...our home directory.
public class HelloWorld {
public static void main(String args[]) {
System.out.println("Hello World!");
}
}
For example, if your username is David, save it as "/Users/David/HelloWorld.java". This simple program declares a single class called HelloWorld, with a s...
Why am I seeing “TypeError: string indices must be integers”?
...
item is most likely a string in your code; the string indices are the ones in the square brackets, e.g., gravatar_id. So I'd first check your data variable to see what you received there; I guess that data is a list of strings (or at least a list ...
How do you clear a slice in Go?
....
See playground
package main
import (
"fmt"
)
func dump(letters []string) {
fmt.Println("letters = ", letters)
fmt.Println(cap(letters))
fmt.Println(len(letters))
for i := range letters {
fmt.Println(i, letters[i])
}
}
func main() {
letters := []string{"a", ...
JavaScript OR (||) variable assignment explanation
...se when used in boolean context, and they are 0, null, undefined, an empty string, NaN and of course false.
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Entity Framework: How to disable lazy loading for specific query?
...ed Aug 14 '15 at 14:13
William BallesterosWilliam Ballesteros
98188 silver badges88 bronze badges
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