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@aws-scripting-guy
aws-scripting-guy / gist:884ffa9d44bd14f7493a670543284552
Created April 2, 2016 18:33
AWS EC2 metadata. Check attached IAM role from EC2 instance. Get temporary credentials.
# Get IAM Role name from Instance Profile Id
curl http://169.254.169.254/latest/meta-data/iam/info
# Get credentials
curl http://169.254.169.254/latest/meta-data/iam/security-credentials/<role-name>
# More info
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-metadata.html
  • Dynamic Dispatch
  • Dynamic Method
  • Ghost Methods
  • Dynamic Proxies
  • Blank Slate
  • Kernel Method
  • Flattening the Scope (aka Nested Lexical Scopes)
  • Context Probe
  • Class Eval (not really a 'spell' more just a demonstration of its usage)
  • Class Macros
@jaydenseric
jaydenseric / gist:7113093
Created October 23, 2013 05:39
How to make a custom jQuery `activate` event. This is useful for UI elements that can be activated by mouse click or using the enter key for keyboard accessibility.
$(document).ready(function() {
$(document).on('click keypress', function(event) {
if (event.type == 'click' || event.which == 13) {
$(event.target).trigger('activate');
}
});
$("button").on('activate', function() {
alert('Button activated!');
});
});
@getify
getify / 1.md
Created November 30, 2012 12:04
rethink how javascript "inheritance" ACTUALLY works...

JavaScript does not have "inheritance" or "prototypal inheritance" or "classes" or any of that jazz... what you've been told, and how you've been taught about it, are a misunderstanding... all this nonsense about constructor functions and new and such... that's all hogwash... well, it's all unnecessary effort, at best.

"Instead... only try to realize the truth... there is no spoon."

What JavaScript does have is "behavior delegation"... and object linking through the "prototype chain"... you merely link two instances of objects together, say Foo and Baz, and say that Baz "delegates" to Foo for any behavior that Baz doesn't own itself but that Foo does own. And thus, any object b (aka, "b is an instance of Baz" in the more confusing terminology) which is linked to Baz, delegates first to Baz, and then to Foo, for behavior.

That's it. Seriously. And function constructors and new and all that stuff, everything you've read before about OO in JS, they're just distractions that lea