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What's the point of map in Haskell, when there is fmap?
...l of those which belongs to the functor class (e.g. maybes, tuples, lists, etc.). Since the "list of values" data type is also a functor (because it provides an implementation for it) then fmap can be applied to is as well producing the very same result as map.
map (+3) [1..5]
fmap (+3) (Just 15)
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How do I handle the window close event in Tkinter?
...opping this activity with destroy() -- even by using protocol(), a button, etc. -- will disturb this activity ("while executing" error) rather than just terminate it. The best solution in almost every case is to use a flag. Here is a simple, silly example of how to use it (although I am certain that...
What's the difference between ContentControl and ContentPresenter?
...8 SDK:
<ContentControl x:Name="contentControl" HorizontalAlignment="Stretch" HorizontalContentAlignment="Stretch" VerticalAlignment="Stretch" VerticalContentAlignment="Stretch">
<ContentPresenter x:Name="contentPresenter" CacheMode="BitmapCache"/>
</ContentControl>
Here you ...
Is it possible to decrypt MD5 hashes?
...change their password (with extra checking if you have a security question/etc) and then the new password is hashed and replaced with old password in database
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What is the difference between named and positional parameters in Dart?
...languages, called positional because "it's the first parameter, or second, etc". Named parameters are called like that because you can actually identify them by name and not by position (if you switch the position of two named params, it doesn't matter). See the answer above from Savaranaraja
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What are the minimum margins most printers can handle?
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@GabrielStaples: On Linux you can find the files in /etc/cups/ppd. In the PPD spec the dimensions are described as lower left and upper right "ll.x ll.y ur.x ur.y".
– Derek Veit
Jul 25 '18 at 14:40
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Setting global styles for Views in Android
...style for various widgets. The key is the textViewStyle (or editTextStyle, etc.) attribute which you override in your custom theme. You can override these in the following way:
Create a styles.xml:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="MyTheme" parent="andr...
Does ruby have real multithreading?
...un one thread at a
time.
However, any number of C Threads (POSIX Threads etc.) can run
in parallel to the Ruby Thread, so external C Libraries, or MRI
C Extensions that create threads of their own can still run in
parallel.
The second implementation is YARV (short for "Yet
Another Ruby VM"). Y...
foldl versus foldr behavior with infinite lists
...step False 1) 2) [3..]
foldl step (step (step (step False 1) 2) 3) [4..]
etc.
Intuitively, foldl is always on the "outside" or on the "left" so it gets expanded first. Ad infinitum.
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Are duplicate keys allowed in the definition of binary search trees?
... the count? What if the tree needs to rebalance that node to a lower level etc.?
– Andrew
Sep 16 at 1:01
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