Tutorial by Examples: alternative

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It's not the best way of iterating through the pixels; however, it's better than cv::Mat::at<T>. Let's assume you have a color image in your folder and you want to iterate each pixels of this image and erase green and red channels(Note that this is an example, you can do this in more optimize...
IF you are using simple categories, with each physics body belonging to only one category, then this alternative form of didBeginContact may be more readable: func didBeginContact(contact: SKPhysicsContact) { let contactMask = contact.bodyA.categoryBitMask | contact.bodyB.categoryBitMask ...
let bodies = (contact.bodyA.categoryBitMask <= contact.bodyB.categoryBitMask) ? (A:contact.bodyA,B:contact.bodyB) : (A:contact.bodyB,B:contact.bodyA) switch (bodies.A.categoryBitMask,bodies.B.categoryBitMask) { case let (a, _) where (a && superPower): //All we care about is i...
SELECT CURRENT_DATE + '1 day'::INTERVAL SELECT '1999-12-11'::TIMESTAMP + '19 days'::INTERVAL SELECT '1 month'::INTERVAL + '1 month 3 days'::INTERVAL
update <SCHEMA_NAME>.<TABLE_NAME_1> AS A SET <COLUMN_1> = True FROM <SCHEMA_NAME>.<TABLE_NAME_2> AS B WHERE A.<COLUMN_2> = B.<COLUMN_2> AND A.<COLUMN_3> = B.<COLUMN_3>
Since every Applicative Functor is a Functor, fmap can always be used on it; thus the essence of Applicative is the pairing of carried contents, as well as the ability to create it: class Functor f => PairingFunctor f where funit :: f () -- create a context, carrying nothing ...
To provide translations in other languages (locales), we need to create a strings.xml in a separate folder by the following convention : res/values-<locale>/strings.xml An example for the same is given below: In this example, we have default English strings in the file res/values/string...
HAML (HTML abstraction markup language) is a beautiful and elegant way to describe and design the HTML of your views. Instead of opening- and closing tags, HAML uses indentation for the structure of your pages. Basically, if something should be placed within another element, you just indent it by us...
In the most straightforward implementation, the Onboarding flow can simply be presented in a modal context, since semantically the User is on a single journey. [Apple Human Interface Guidelines – Modality][1]: Consider creating a modal context only when it’s critical to get someone’s attention, ...

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