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How to efficiently count the number of keys/properties of an object in JavaScript?
...at's the fastest way to count the number of keys/properties of an object? It it possible to do this without iterating over the object? i.e. without doing
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How do I start PowerShell from Windows Explorer?
...hell or powershell_ise and press Enter. A PowerShell command window opens with the current directory.
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Is there a documented way to set the iPhone orientation?
...apping the views out I would like to force the rotation to be set to portrait.
17 Answers
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How does interfaces with construct signatures work?
...ame);
This creates an actual constraint for what you can invoke makeObj with:
class Other implements ComesFromString {
constructor (public name: string, count: number) {
}
}
makeObj(Other); // Error! Other's constructor doesn't match StringConstructable
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Objective-C : BOOL vs bool
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From the definition in objc.h:
#if (TARGET_OS_IPHONE && __LP64__) || TARGET_OS_WATCH
typedef bool BOOL;
#else
typedef signed char BOOL;
// BOOL is explicitly signed so @encode(BOOL) == "c" rather than "C"
// even if -funsigned...
How to find the lowest common ancestor of two nodes in any binary tree?
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Nick Johnson is correct that a an O(n) time complexity algorithm is the best you can do if you have no parent pointers.) For a simple recursive version of that algorithm see the code in Kinding's post which runs in O(n) time.
But keep in mind that if your nodes have parent p...
Why start an ArrayList with an initial capacity?
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If you know in advance what the size of the ArrayList is going to be, it is more efficient to specify the initial capacity. If you don't do this, the internal array will have to be repeatedly reallocated as the list grows.
The larger the final list, the more time you save by avoiding the reall...
Can the Android drawable directory contain subdirectories?
In the Android SDK documentation, all of the examples used with the @drawable/my_image xml syntax directly address images that are stored in the res/drawable directory in my project.
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How can I check if a view is visible or not in Android? [duplicate]
I set visibility to invisible like this on Android:
4 Answers
4
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Suggestions for debugging print stylesheets?
I've recently been working on a print stylesheet for a website, and I realized that I was at a loss for effective ways to tweak it. It's one thing to have a reload cycle for working on the on-screen layout:
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