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Check if an array contains any element of another array in JavaScript
...(r))
ES6:
const found = arr1.some(r=> arr2.indexOf(r) >= 0)
How it works
some(..) checks each element of the array against a test function and returns true if any element of the array passes the test function, otherwise, it returns false. indexOf(..) >= 0 and includes(..) both return ...
What is the length of the access_token in Facebook OAuth2?
...
I work at Facebook and I can give a definitive answer about this.
Please don't put a maximum size on the storage for an access token. We expect that they will both grow and shrink over time as we add and remove data and change how they are encoded.
We did give gu...
How to determine whether an object has a given property in JavaScript
...ct has property:
If you are testing for properties that are on the object itself (not a part of its prototype chain) you can use .hasOwnProperty():
if (x.hasOwnProperty('y')) {
// ......
}
Object or its prototype has a property:
You can use the in operator to test for properties that are inh...
Default template arguments for function templates
...
It makes sense to give default template arguments. For example you could create a sort function:
template<typename Iterator,
typename Comp = std::less<
typename std::iterator_traits<Iterator>...
How do you work with an array of jQuery Deferreds?
... loaded in a certain order: the root URL, then the schemas, then finally initialize the application with the schemas and urls for the various data objects. As the user navigates the application, data objects are loaded, validated against the schema, and displayed. As the user CRUDs the data, the s...
Confused about __str__ on list in Python [duplicate]
...t uses str(); printing a list containing an object uses str() for the list itself, but the implementation of list.__str__() calls repr() for the individual items.
So you should also overwrite __repr__(). A simple
__repr__ = __str__
at the end of the class body will do the trick.
...
How do I get the height and width of the Android Navigation Bar programmatically?
...gation bar on the bottom of the screen is not easily removable in Android. It has been part of Android since 3.0 as a replacement for hardware buttons. Here is a picture:
...
What does “Protocol … can only be used as a generic constraint because it has Self or associated typ
...Dictionary (actually a HashSet ) keyed on a custom protocol in Swift, but it is giving me the error in the title:
2 Answer...
What are named pipes?
...n the same machine. What named pipes give you is a way to send your data without having the performance penalty of involving the network stack.
Just like you have a server listening to a IP address/port for incoming requests, a server can also set up a named pipe which can listen for requests. In...
How do I represent a hextile/hex grid in memory?
Say I'm building a board game with a hextile grid, like Settlers of Catan :
9 Answers
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