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What are type lambdas in Scala and what are their benefits?
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Type lambdas are vital quite a bit of the time when you are working with higher-kinded types.
Consider a simple example of defining a monad for the right projection of Either[A, B]. The monad typeclass looks like this:
trait Monad[M[_]] {
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Regex Email validation
...e;
}
}
This saves you a lot af headaches because you don't have to write (or try to understand someone else's) regex.
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JavaScript function similar to Python range()
...e.
JavaScript's implementation of Python's range()
Trying to emulate how it works in Python, I would create function similar to this:
function range(start, stop, step) {
if (typeof stop == 'undefined') {
// one param defined
stop = start;
start = 0;
}
if (type...
FragmentPagerAdapter Exists Only In Android.Support.V4.App (and not Android.App)
I cannot find find FragmentPagerAdapter within Android.App.
5 Answers
5
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Can I have multiple Xcode versions installed?
Is it possible to have more than one version of Xcode installed at the same time?
12 Answers
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How to check an Android device is HDPI screen or MDPI screen?
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density = getResources().getDisplayMetrics().density;
// return 0.75 if it's LDPI
// return 1.0 if it's MDPI
// return 1.5 if it's HDPI
// return 2.0 if it's XHDPI
// return 3.0 if it's XXHDPI
// return 4.0 if it's XXXHDPI
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Get content uri from file path in android
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Try with:
ImageView.setImageURI(Uri.fromFile(new File("/sdcard/cats.jpg")));
Or with:
ImageView.setImageURI(Uri.parse(new File("/sdcard/cats.jpg").toString()));
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✔ Checkmark selected row in UITableViewCell
I am an iOS development newbie. I want to add a checkmark to my UITableViewCell when it is selected. The checkmark should be removed when another row is selected. How would I do this?
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How to include jar files with java file and compile in command prompt
...ava file that depends on these jar files. How do I compile the .java file with these jar files using a command prompt?
12 A...
Best way to create a simple python web service [closed]
I've been using python for years, but I have little experience with python web programming. I'd like to create a very simple web service that exposes some functionality from an existing python script for use within my company. It will likely return the results in csv. What's the quickest way to get ...