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How to efficiently compare two unordered lists (not sets) in Python?
...he list by value, on the other hand, first you need to define what "value" means for the objects. Then you will need some way to provide that as a key (and for Python 3, as a consistent type). One potential way that would work for a lot of arbitrary objects is to sort by their repr(). Of course, thi...
Index on multiple columns in Ruby on Rails
...ning at the same time, the validation is subject to race conditions, which means it might fail to detect duplicates in some cases (eg. submit twice the same form at the exact same time).
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How to find out client ID of component for ajax update/render? Cannot find component with expression
...eFaces 5.2 versions. The support might come in the future versions. In the meanwhile, your best bet is to update the iterating component itself, or a parent in case it doesn't render HTML, like <ui:repeat>.
When using PrimeFaces, consider Search Expressions or Selectors
PrimeFaces Search Exp...
Why is the String class declared final in Java?
...ople making the point about immutability were unclear in exactly what they meant, but their statements are correct when understood in context.
– Jay
Jan 28 '11 at 21:20
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How do I join two SQLite tables in my Android application?
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"Ambiguous column" usually means that the same column name appears in at least two tables; the database engine can't tell which one you want. Use full table names or table aliases to remove the ambiguity.
Here's an example I happened to have in my ed...
Show/hide 'div' using JavaScript
... probably just be toggling between display: none and display: block, which means that the following may be sufficient when showing a collection of elements.
You can optionally specify the desired display as the second argument if you don't want it to default to block.
function show (elements, spec...
How are feature_importances in RandomForestClassifier determined?
..."importances". As often, there is no strict consensus about what this word means.
In scikit-learn, we implement the importance as described in [1] (often cited, but unfortunately rarely read...). It is sometimes called "gini importance" or "mean decrease impurity" and is defined as the total decrea...
How to select an element by classname using jqLite?
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angualr uses the lighter version of jquery called as jqlite which means it doesnt have all the features of jQuery. here is a reference in angularjs docs about what you can use from jquery.
Angular Element docs
In your case you need to find a div with ID or class name.
for class name you ...
Unsafe JavaScript attempt to access frame with URL
...h property, but you are allowed to set the location property itself.
This means that given that the top windows location is http://example.com/page/, instead of doing
parent.location.hash = "#foobar";
you do need to know the parents location and do
parent.location = "http://example.com/page/#fo...
How do I prevent site scraping? [closed]
..., those articles will be only accessible by using the search feature. This means that a script wanting to get all the articles off your site will have to do searches for all possible phrases which may appear in your articles in order to find them all, which will be time-consuming, horribly inefficie...