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What is the http-header “X-XSS-Protection”?
... Details are hard to find because it is a proprietary technology. Essentially, IE monitors if any of the suspiciously-looking parameters that the browser sends to a website come back in the response decoded. For example, if a user clicks on attack-me.com/… (which is "><script>alert('XS...
Purge or recreate a Ruby on Rails database
...o this:
This will reset your database and reload your current schema with all:
rake db:reset db:migrate
This will destroy your db and then create it and then migrate your current schema:
rake db:drop db:create db:migrate
All data will be lost in both scenarios.
...
Extending Angular Directive
I'd like to make a minor modification to a 3rd party directive (specifically Angular UI Bootstrap ). I simply want to add to the scope of the pane directive:
...
How to install Google Play Services in a Genymotion VM (with no drag and drop support)?
How can I install Google Play Services in a Genymotion emulator with no drag and drop support?
17 Answers
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Check if an element contains a class in JavaScript?
...List .contains method:
element.classList.contains(class);
This works on all current browsers and there are polyfills to support older browsers too.
Alternatively, if you work with older browsers and don't want to use polyfills to fix them, using indexOf is correct, but you have to tweak it a ...
Why CancellationToken is separate from CancellationTokenSource?
...ntended for use in a great many scenarios (such as deep library stacks, parallel computation, async, etc) and thus was designed with many complex use cases in mind. It is a design intended to encourage successful patterns and discourage anti-patterns without sacrificing performance.
If the door ...
Is there a foreach in MATLAB? If so, how does it behave if the underlying data changes?
... the data structure, you should use an appropriate Iterator instance which allows the addition and removal of elements in the collection you are iterating. The good news is that MATLAB supports Java objects, so you can do something like this:
A = java.util.ArrayList();
A.add(1);
A.add(2);
A.add(3);...
How do I return early from a rake task?
...
A Rake task is basically a block. A block, except lambdas, doesn't support return but you can skip to the next statement using next which in a rake task has the same effect of using return in a method.
task :foo do
puts "printed"
next
put...
How can I center an absolutely positioned element in a div?
...html> element doesn't have a height specified so it takes the height of all the content in the document, which is nothing because the only content is absolutely-positioned (taken out of content flow). Adding height: 100% to the <html> element makes a difference to this.
...
Should I use tag for icons instead of ? [closed]
...es shortness and the nice association of "i is for icon," I think it's actually the most semantic choice for an icon when a straightforward <img> tag is not practical.
1. The usage is consistent with the spec.
While it may not be what the W3 mainly had in mind, it seems to me the official sp...