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Finding all possible combinations of numbers to reach a given sum
... reach the number why bother to continue
(0..(numbers.length - 1)).each do |i|
n = numbers[i]
remaining = numbers.drop(i+1)
subset_sum(remaining, target, partial + [n])
end
end
subset_sum([3,9,8,4,5,7,10],15)
Edit: complexity discussion
As others mention this is an NP-hard probl...
AngularJs: How to check for changes in file input fields?
...use 'onChange' it works but when i use it angular way using 'ng-change' it doesn't work.
15 Answers
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What is the difference between YAML and JSON?
...ither of these last two points will likely matter for things that you or I do, but in the long term, I think YAML will be a more robust and viable data serialization format.
Right now, AJAX and other web technologies tend to use JSON. YAML is currently being used more for offline data processes. F...
How should I choose an authentication library for CodeIgniter? [closed]
...solid library that has all the features you need and none of the bloat you don't:
Tank Auth
Pros
Full featured
Lean footprint (20 files) considering the feature set
Very good documentation
Simple and elegant database design (just 4 DB tables)
Most features are optional and easily configured
Langua...
Pretty git branch graphs
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Yeah, I do. Normal and bright/bold colors are: Black #202020/#555555, Red: #5d1a14/#da4939, Green: #424e24/#a5c261, Yellow: #6f5028/#ffc66d, Blue: #263e4e/#6d9cbe, Magenta: #3e1f50/#a256c7, Cyan: #234e3f/#62c1a1, and White: #979797/#...
What is thread safe or non-thread safe in PHP?
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Needed background on how PHP "integrates" with web servers:
PHP itself does not respond to the actual HTTP requests -- this is the job of the web server. So we configure the web server to forward requests to PHP for processing, then receive the result and send it back to the user. There are mult...
.NET Configuration (app.config/web.config/settings.settings)
..., integration, test, stage, live) has its own unique settings in the c:\Windows\Microsoft.NET\Framework64\v2.0.50727\CONFIG directory, then you can promote your application code between environments without any post-build modifications.
And obviously, the contents of the machine-level CONFIG direct...
Neo4j - Cypher vs Gremlin query language
...ons). I expect, however, that even if i would need to use Gremlin, I would do so for a specific query I would find on the net and never come back to again.
You can always learn Cypher really fast (in days) and then continue with the (longer-run) general Gremlin.
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Multi-line string with extra space (preserved indentation)
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Heredoc sounds more convenient for this purpose. It is used to send multiple commands to a command interpreter program like ex or cat
cat << EndOfMessage
This is line 1.
This is line 2.
Line 3.
EndOfMessage
The string af...
Entity Framework 6 Code first Default value
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You can do it by manually edit code first migration:
public override void Up()
{
AddColumn("dbo.Events", "Active", c => c.Boolean(nullable: false, defaultValue: true));
}
...