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Should I use single or double colon notation for pseudo-elements?
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http://www.w3.org/TR/CSS2/syndata.html#rule-sets
You could however use
.foo:after { /*styles*/ }
.foo::after { /*styles*/ }
On the other hand this is more verbose than necessary; for now, you can stick with the one-colon notation.
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How do browser cookie domains work?
...ple.com) will only be accessible for other domains below that domain (e.g. foo.www.example.com or bar.www.example.com) where .example.com can also be accessed by any other domain below example.com (e.g. foo.example.com or bar.example.com).
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Check if event exists on element [duplicate]
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$('body').click(function(){ alert('test' )})
var foo = $.data( $('body').get(0), 'events' ).click
// you can query $.data( object, 'events' ) and get an object back, then see what events are attached to it.
$.each( foo, function(i,o) {
alert(i) // guid of the event
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Save modifications in place with awk
...the GNU "sed -i" feature. [...]
Example usage:
$ gawk -i inplace '{ gsub(/foo/, "bar") }; { print }' file1 file2 file3
To keep the backup:
$ gawk -i inplace -v INPLACE_SUFFIX=.bak '{ gsub(/foo/, "bar") }
> { print }' file1 file2 file3
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finding and replacing elements in a list
...a dictionary:
a = [1, 2, 3, 4, 1, 5, 3, 2, 6, 1, 1]
dic = {1:10, 2:20, 3:'foo'}
print([dic.get(n, n) for n in a])
> [10, 20, 'foo', 4, 10, 5, 'foo', 20, 6, 10, 10]
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What it the significance of the Javascript constructor property?
...reate your object. If you typed new Bar() it will be Bar and you typed new Fooit will be Foo.
The prototype
The prototype property is used for lookup in case the object in question does not have the property asked for. If you write x.attr, JavaScript will try to find attr among x's attributes. If ...
How does the “this” keyword work?
...is
Simple function invocation
Consider the following function:
function foo() {
console.log("bar");
console.log(this);
}
foo(); // calling the function
Note that we are running this in the normal mode, i.e. strict mode is not used.
When running in a browser, the value of this would be ...
setState vs replaceState in React.js
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Definition by example:
// let's say that this.state is {foo: 42}
this.setState({bar: 117})
// this.state is now {foo: 42, bar: 117}
this.setState({foo: 43})
// this.state is now {foo: 43, bar: 117}
this.replaceState({baz: "hello"})
// this.state. is now {baz: "hello"}
Take...
Is there a way to instantiate a class by name in Java?
...stance() method on this object:
Class<?> clazz = Class.forName("com.foo.MyClass");
Constructor<?> constructor = clazz.getConstructor(String.class, Integer.class);
Object instance = constructor.newInstance("stringparam", 42);
Both methods are known as reflection. You will typically hav...
bodyParser is deprecated express 4
...nded true is that not using extended means that curl --data "user[email]=foo&user[password]=bar" localhost:3000/login would be received by the server in req.body as { user[email]: "foo", ...} whereas req.body would be {user: {email: "foo", ... }} with extended: true.
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