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Concat all strings inside a List using LINQ
...ng delimiter = ",";
List<string> items = new List<string>() { "foo", "boo", "john", "doe" };
Console.WriteLine(items.Aggregate((i, j) => i + delimiter + j));
class description:
public class Foo
{
public string Boo { get; set; }
}
Usage:
class Program
{
static void Main(s...
Swap key with value JSON
...operty name for a pretty straightforward single statement solution.
const foo = { a: 1, b: 2, c: 3 };
const bar = Object.keys(foo)
.reduce((obj, key) => Object.assign({}, obj, { [foo[key]]: key }), {});
If you're transpiling using the object spread operator (stage 3 as of writing this) tha...
What is the difference between the HashMap and Map objects in Java?
...nderlying implementation.
Example: Let's say I write this class:
class Foo {
private HashMap<String, Object> things;
private HashMap<String, Object> moreThings;
protected HashMap<String, Object> getThings() {
return this.things;
}
protected HashMap...
Remove a symlink to a directory
...
# this works:
rm foo
# versus this, which doesn't:
rm foo/
Basically, you need to tell it to delete a file, not delete a directory. I believe the difference between rm and rmdir exists because of differences in the way the C library treats ...
Remove substring from the string
...
You can use the slice method:
a = "foobar"
a.slice! "foo"
=> "foo"
a
=> "bar"
there is a non '!' version as well. More info can be seen in the documentation about other versions as well:
http://www.ruby-doc.org/core/classes/String.html#method-i-slice-2...
How to create an array for JSON using PHP?
...d_array = array(
"nome_array" => array(
array(
"foo" => "bar"
),
array(
"foo" => "baz"
)
)
);
echo json_encode($named_array);
share
|
...
sys.argv[1] meaning in script
...
> python print_args.py
['print_args.py'] 1
> python print_args.py foo and bar
['print_args.py', 'foo', 'and', 'bar'] 4
> python print_args.py "foo and bar"
['print_args.py', 'foo and bar'] 2
> python print_args.py "foo and bar" and baz
['print_args.py', 'foo and bar', 'and', 'baz'] ...
Why is “while ( !feof (file) )” always wrong?
...t * p = buf;
ssize_t n = bufsize;
for (ssize_t k = bufsize; (k = write(fd, p, n)) > 0; p += k, n -= k) {}
if (n != 0) { /* error, failed to write complete buffer */ }
The result we use here is k, the number of bytes written. The point here is that we can only know how many bytes were wri...
Compare two objects' properties to find differences?
...on is only
/// completed on COMMON properties.
/// (ex. Type T is Foo, object1 is GoodFoo and object2 is BadFoo -- both being inherited from Foo --
/// both objects will be cast to Foo for comparison)
/// </para>
/// </summary>
/// <typeparam name="T">Any c...
Can I invoke an instance method on a Ruby module without including it?
... call it off of Mods as if it had been declared as
module Mods
def self.foo
puts "Mods.foo(self)"
end
end
The module_function approach below will avoid breaking any classes which include all of Mods.
module Mods
def foo
puts "Mods.foo"
end
end
class Includer
include Mods
end
...