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...rticle. Pythons hashing algorithms are explained on effbot.org and pythons __hash__ function in the python reference.
Some facts:
Set elements as well as dictionary keys have to be hashable
Some unhashable datatypes:
list: use tuple instead
set: use frozenset instead
dict: has no official count...
How to get a subset of a javascript object's properties
...og(picked); // { a: 5, c: 7 }
From Philipp Kewisch:
This is really just an anonymous function being called instantly. All of this can be found on the Destructuring Assignment page on MDN. Here is an expanded form
let unwrap = ({a, c}) => ({a, c});
let unwrap2 = function({a, ...
Javascript - remove an array item by value [duplicate]
...tag_story = [1,3,56,6,8,90],
id_tag = 90,
position = tag_story.indexOf(id_tag);
if ( ~position ) tag_story.splice(position, 1);
P.S. For an explanation of that cool ~ tilde shortcut, see this post:
Using a ~ tilde with indexOf to check for the existence of an item in an array.
Note: I...
Handling optional parameters in javascript
... second argument is a function or not:
function getData (id, parameters, callback) {
if (arguments.length == 2) { // if only two arguments were supplied
if (Object.prototype.toString.call(parameters) == "[object Function]") {
callback = parameters;
}
}
//...
}
You can also us...
How to add “active” class to Html.ActionLink in ASP.NET MVC
...ges, it would be smart to have a way to apply that selected class automatically based on the current page rather than copy the menu multiple times and do it manually.
The easiest way is to simply use the values contained in ViewContext.RouteData, namely the Action and Controller values. We could b...
How to change the ROOT application?
...tdown your Tomcat from the its bin directory (sh shutdown.sh). Then delete all the content of your Tomcat webapps folder (rm -fr *). Then rename your WAR file to ROOT.war, and finally start your Tomcat from the bin directory (sh startup.sh).
Leave your war file in $CATALINA_BASE/webapps under its or...
How to delete projects in IntelliJ 12?
... project you just deleted. So I am thinking there should be another (and really easy way) to delete a project.
10 Answers
...
How can I use Guzzle to send a POST request in JSON?
... edited Aug 18 at 7:06
Valor_
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answered Mar 7 '14 at 8:56
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How to assign name for a screen? [closed]
...
A quick note on C-a : syntax.... "All screen commands are prefixed by an escape key, by default C-a (that's Control-a, sometimes written ^a). To send a literal C-a to the programs in screen, use C-a a. This is useful when working with screen within screen. Fo...
Emacs on Mac OS X Leopard key bindings
... Preferences...
Under the Settings tab, go to the Keyboard tab
Check the box labeled Use option as meta key
That's it! You should be well on your way to becoming an Emacs master!
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