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How to use single storyboard uiviewcontroller for multiple subclass
...ave exactly the same interface but with root view controller of class SpecificViewController1 and SpecificViewController2 which are subclasses of BasicViewController .
Those 2 view controllers would have the same functionality and interface except for the IBAction method.
It would be like...
Check that Field Exists with MongoDB
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@fernandohur: yeah, but if you have less than one page of documents, you won't even see the difference. And if you were to run this query from external driver, I'm pretty sure most of them shield you from the cursor implementation detail.
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What is the difference between graph search and tree search?
What is the difference between graph search and tree search versions regarding DFS, A* searches in artificial intelligence ?
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Call one constructor from another
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If what you want can't be achieved satisfactorily without having the initialization in its own method (e.g. because you want to do too much before the initialization code, or wrap it in a try-finally, or whatever) you can hav...
What does SQL clause “GROUP BY 1” mean?
...first column in select statement which is
account_id.
You also can specify in ORDER BY.
Note : The number in ORDER BY and GROUP BY always start with 1 not with 0.
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Implications of foldr vs. foldl (or foldl')
...or foldl f x ys looks like
f (... (f (f x y1) y2) ...) yk
An important difference here is that if the result of f x y can be computed using only the value of x, then foldr doesn't' need to examine the entire list. For example
foldr (&&) False (repeat False)
returns False whereas
fold...
How to display long messages in logcat
I am trying to display long message on logcat. If the length of message is more than 1000 characters, it gets broken.
10 A...
New Array from Index Range Swift
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#1. Using Array subscript with range
With Swift 5, when you write…
let newNumbers = numbers[0...position]
… newNumbers is not of type Array<Int> but is of type ArraySlice<Int>. That's because Array's subscript(_:) returns an ArraySlice<Element...
How to show soft-keyboard when edittext is focused
...ant to automatically show the soft-keyboard when an EditText is focused (if the device does not have a physical keyboard) and I have two problems:
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Check whether an input string contains a number in javascript
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If I'm not mistaken, the question requires "contains number", not "is number". So:
function hasNumber(myString) {
return /\d/.test(myString);
}
s...