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Calculate the median of a billion numbers
...ian of medians and quickselect algorithms. en.wikipedia.org/wiki/Selection_algorithm
– Dimath
Jan 9 '13 at 2:32
...
Automatically capture output of last command into a variable using Bash?
...y getting at results.
That being said, here is the "solution":
PROMPT_COMMAND='LAST="`cat /tmp/x`"; exec >/dev/tty; exec > >(tee /tmp/x)'
Set this bash environmental variable and issues commands as desired. $LAST will usually have the output you are looking for:
startide seth> ...
Finding sum of elements in Swift array
...parameter:
extension Sequence {
func sum<T: AdditiveArithmetic>(_ keyPath: KeyPath<Element, T>) -> T { reduce(.zero) { $0 + $1[keyPath: keyPath] } }
}
Usage:
struct Product {
let id: String
let price: Decimal
}
let products: [Product] = [.init(id: "abc", price: 21.9),
...
What is a lambda (function)?
...res have.
Examples in other languages
Perl 5
sub adder {
my ($x) = @_;
return sub {
my ($y) = @_;
$x + $y
}
}
my $add5 = adder(5);
print &$add5(1) == 6 ? "ok\n" : "not ok\n";
JavaScript
var adder = function (x) {
return function (y) {
return x + y;
...
How to concatenate strings in twig
...swer. But it appears that | trans filter doesn't work on that (eg: {{ 'test_' ~ name | trans }} won't translate my items. Do you have an idea how to do that? thx!
– guillaumepotier
Jan 8 '12 at 14:21
...
How do I change bash history completion to complete what's already on the line?
...nswered Jan 21 '14 at 23:44
nate_weldonnate_weldon
2,1992323 silver badges3232 bronze badges
...
What is the size of ActionBar in pixels?
...
Thank you. I was trying to use @dimen/abc_action_bar_default_height directly (ActionBarComapt) and it worked (on mdpi device). But trying to get this value on Samsung Galaxy SIII returned me wrong value. That is because values-xlarge (somehow) is more preferred than...
querySelector and querySelectorAll vs getElementsByClassName and getElementById in JavaScript
...at is a member of the foo class: .foo li
document.querySelector("#view:_id1:inputText1") it doesn't work. But writing document.getElementById("view:_id1:inputText1") works. Any ideas why?
The : character has special meaning inside a selector. You have to escape it. (The selector escape charact...
How to find where gem files are installed
...EMS VERSION: 2.1.5
- RUBY VERSION: 2.0.0 (2013-06-27 patchlevel 247) [x86_64-darwin12.4.0]
- INSTALLATION DIRECTORY: /Users/ttm/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0
- RUBY EXECUTABLE: /Users/ttm/.rbenv/versions/2.0.0-p247/bin/ruby
- EXECUTABLE DIRECTORY: /Users/ttm/.rbenv/versions/...
What's the meaning of interface{}?
... for a type is called the "interface type". Let's call it in our example: T_interface. Is equal to T_interface = (A, B, C)
You can create an "interface type" by defining the signature of the methods. MyInterface = (A, )
When you specify a variable of type, "interface type", you can assign to it onl...