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Generate list of all possible permutations of a string
...t the the initial input was sorted and finding indexes (k0 and l0) itself, based on where the ordering is maintained. Sorting an input like "54321" -> "12345" would allow this algorithm to find all of the expected permutations. But since it does a good amount of extra work to re-find those indexe...
Can Rails Routing Helpers (i.e. mymodel_path(model)) be Used in Models?
...Error (undefined method `optimize_routes_generation?' for #<ActionView::Base:0x007fe8c0eecbd0>) when I try this
– moger777
Jan 23 '15 at 15:31
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Replace duplicate spaces with a single space in T-SQL
...ll the double spaces, no need to put in multiple replaces. This is the set-based solution.
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How to recursively list all the files in a directory in C#?
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Note that in .NET 4.0 there are (supposedly) iterator-based (rather than array-based) file functions built in:
foreach (string file in Directory.EnumerateFiles(path, "*.*", SearchOption.AllDirectories))
{
Console.WriteLine(file);
}
At the moment I'd use something like bel...
Calling static generic methods
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Yes, this is type inference based on the target of the assignment, as per JLS section 15.12.2.8. To be explicit, you'd call something like:
Foo.<String>createFoo();
shar...
How to call shell commands from Ruby
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This explanation is based on a commented Ruby script from a friend of mine. If you want to improve the script, feel free to update it at the link.
First, note that when Ruby calls out to a shell, it typically calls /bin/sh, not Bash. Some Bash ...
How can I find out the current route in Rails?
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Based on @AmNaN suggestion (more details):
class ApplicationController < ActionController::Base
def current_controller?(names)
names.include?(params[:controller]) unless params[:controller].blank? || false
end
help...
“message failed to fetch from registry” while trying to install any module
...ining a recent version of Node or installing on older Ubuntu and other apt-based distributions may require a few extra steps. Example install:
sudo apt-get update
sudo apt-get install -y python-software-properties python g++ make
sudo add-apt-repository ppa:chris-lea/node.js
sudo apt-get update
su...
Javascript Equivalent to C# LINQ Select
...r my where() + firstOrDefault(). These could also be used with the string based function constructor approach (which is the fastest), but here is another approach using an object literal as filter:
Array.prototype.where = function (filter) {
var collection = this;
switch(typeof filter) {...
Android: How to create a Dialog without a title?
... Well, according to the official documentation, "A dialog made with the base Dialog class must have a title. If you don't call setTitle(), then the space used for the title remains empty, but still visible. If you don't want a title at all, then you should create your custom dialog using the Aler...