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What is declarative programming? [closed]
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Because you don't prescribe the computer which steps to take and in what order, it can rearrange your program much more freely, maybe even execute some tasks in parallel. A good example is a query planner and query optimizer for a SQL database. Most SQL databases allow you to display the query tha...
What's the cleanest way of applying map() to a dictionary in Swift?
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With Swift 5, you can use one of the five following snippets in order to solve your problem.
#1. Using Dictionary mapValues(_:) method
let dictionary = ["foo": 1, "bar": 2, "baz": 5]
let newDictionary = dictionary.mapValues { value in
return value + 1
}
//let newDictionary = dict...
Incrementing in C++ - When to use x++ or ++x?
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@BeowulfOF: The answer implies an order which doesn't exist. There is nothing in the standard to say when the increments take place. The compiler is entitled to implement "x += i++" as: int j = i; i=i+1 ; x += j;" (ie. 'i' incremented before "processing th...
How can I determine if a JavaScript variable is defined in a page? [duplicate]
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To avoid accidental assignment, I make a habit of reversing the order of the conditional expression:
if ('undefined' !== typeof x) {
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Comparing Java enum members: == or equals()?
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@Nivas: why not? Do you like worrying about the order of your arguments (which only applies to comparing constants from the left, as in Pascal's answer)? Do you like always checking that a value is not null before .equals()ing it? I know I don't.
– Ma...
Why is SSE scalar sqrt(x) slower than rsqrt(x) * x?
...table, similar to mathematical tables of old, using adjustments to the low-order bits to save on transistors.)
The reason why it's available is that it is the initial estimate used by the FPU for the "real" square root algorithm.
There's also an approximate reciprocal instruction, rcp. Both of these...
Scrollview vertical and horizontal in android
... }
return true;
}
});
You can change the order of the scrollviews. Just change their order in layout and in the code. And obviously instead of WateverViewYouWant you put the layout/views you want to scroll both directions.
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What is a Y-combinator? [closed]
...guy by the name of
Haskell Curry has a neat trick, if you have good higher order
functions then you only need functions of 1 variable. The
proof is that you can get from functions of 2 (or more in the
general case) variables to 1 variable with a purely
mechanical text transformation like this:
// ...
Using multiple let-as within a if-statement in Swift
... 3, you can use optional chaining, switch statement or optional pattern in order to solve your problem.
1. Using if let (optional binding / optional chaining)
The Swift Programming Language states about optional chaining:
Multiple queries can be chained together, and the entire chain fails g...
How to use Sphinx's autodoc to document a class's __init__(self) method?
... How do I use this? It seems the method must be named setup(app) in order to be executed by Sphinx.
– oarfish
Aug 16 '18 at 13:46
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