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How to generate a random string in Ruby
...).chr }.join
I spend too much time golfing.
(0...50).map { ('a'..'z').to_a[rand(26)] }.join
And a last one that's even more confusing, but more flexible and wastes fewer cycles:
o = [('a'..'z'), ('A'..'Z')].map(&:to_a).flatten
string = (0...50).map { o[rand(o.length)] }.join
...
Start ssh-agent on login
...a remote Git repo pulling from Bitbucket.com using an SSH alias. I can manually start the ssh-agent on my server but I have to do this every time I login via SSH.
...
What is the difference between exit(0) and exit(1) in C?
...ccessful program termination & it is fully portable, While
exit(1) (usually) indicates unsucessful termination. However, it's usage is non-portable.
Note that the C standard defines EXIT_SUCCESS and EXIT_FAILURE to return termination status from a C program.
0 and EXIT_SUCCESS are the values s...
What does “WARN Could not determine content-length of response body.” mean and how to I get rid of i
...e to a future release of Ruby.
I'm using rails 3.2.0 on ruby 1.9.3-p0 installed through RVM as a single user. So the location in my case is:
~/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/webrick/httpresponse.rb
The location of the file to be altered differs depending on the type of installation, R...
When to use IMG vs. CSS background-image?
...ng icon. This ensures that the meaning of the image can be communicated in all user-agents, including screen readers.
Pragmatic uses of IMG
Use IMG plus alt attribute if the image
is part of the content such as a logo or diagram or person (real person, not stock photo people).
—sanchothefat...
How does Stack Overflow generate its SEO-friendly URLs?
...I benchmarked it). I figured I'd optimize it because this function can be called hundreds of times per page.
/// <summary>
/// Produces optional, URL-friendly version of a title, "like-this-one".
/// hand-tuned for speed, reflects performance refactoring contributed
/// by John Gietzen (user...
Difference between case object and object
...of serialization
a prettier default implementation of toString, and
the small amount of functionality that they get from automatically inheriting from scala.Product.
Pattern matching, equals and hashCode don't matter much for singletons (unless you do something really degenerate), so you're pre...
Composer: how can I install another dependency without updating old ones?
I have a project with a few dependencies and I'd like to install another one, but I'd like to keep the others the way they are. So I've edited the composer.json , but if I run composer install , I get the following output:
...
JavaScript post request like a form submit
...y: post('/contact/', {name: 'Johnny Bravo', csrfmiddlewaretoken: $("#csrf_token").val()});
– Davidson Lima
Nov 22 '17 at 16:09
...
Reactjs convert html string to jsx
...se the dangerouslySetInnerHTML property:
<td dangerouslySetInnerHTML={{__html: this.state.actions}} />
React forces this intentionally-cumbersome syntax so that you don't accidentally render text as HTML and introduce XSS bugs.
...