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Why do some claim that Java's implementation of generics is bad?
...has its generic type argument stripped off by the compiler because it is a raw type (meaning the parameterized type isn't supplied) even though it has nothing to do with the parameterized type.
I'll also mention my favourite declaration from the JDK:
public class Enum<T extends Enum<T>>...
Convert RGBA PNG to RGB with PIL
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This code was causing a error for me: tuple index out of range. I fixed this by following another question(stackoverflow.com/questions/1962795/…). I had to convert the PNG to RGBA first and then slice it: alpha = img.split()[-1] then use that on the background mask.
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Matplotlib discrete colorbar
...lormap
# extract all colors from the .jet map
cmaplist = [cmap(i) for i in range(cmap.N)]
# force the first color entry to be grey
cmaplist[0] = (.5, .5, .5, 1.0)
# create the new map
cmap = mpl.colors.LinearSegmentedColormap.from_list(
'Custom cmap', cmaplist, cmap.N)
# define the bins and no...
How do you iterate through every file/directory recursively in standard C++?
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From C++17 onward, the <filesystem> header, and range-for, you can simply do this:
#include <filesystem>
using recursive_directory_iterator = std::filesystem::recursive_directory_iterator;
...
for (const auto& dirEntry : recursive_directory_iterator(myPath))
...
How to pip install a package with min and max version range?
...uestions%2f8795617%2fhow-to-pip-install-a-package-with-min-and-max-version-range%23new-answer', 'question_page');
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“implements Runnable” vs “extends Thread” in Java
...call threadA.run().
Caveat: Around here, I strongly discourage the use of raw Threads. I much prefer the use of Callables and FutureTasks (From the javadoc: "A cancellable asynchronous computation"). The integration of timeouts, proper cancelling and the thread pooling of the modern concurrency s...
Python module for converting PDF to text [closed]
... from packtpub). Every other piece of code just return the weirdly encoded raw stuff but yours actually returns text. Thanks!
– somada141
Jan 30 '16 at 1:42
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What does the “map” method do in Ruby?
...s you use map!):
[1, 2, 3].map { |n| n * n } #=> [1, 4, 9]
Array and Range are enumerable types. map with a block returns an Array. map! mutates the original array.
Where is this helpful, and what is the difference between map! and each? Here is an example:
names = ['danil', 'edmund']
# he...
Iterate through a C++ Vector using a 'for' loop
...While using iterators it is hard to go wrong with certain cases like empty ranges and the code is more verbose.Ofcourse its a matter or perception and choice, So it can be debated endlessly.
– Alok Save
Oct 3 '12 at 7:08
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How to delete history of last 10 commands in shell?
...ry 1 | awk '{print $1}'
Putting it together you can use this to delete a range, and also delete the history delete command:
for h in $(seq 1006 1008); do history -d 1006; done; history -d $(history 1 | awk '{print $1}')
Wrap this all up in a function to add to your ~/.bashrc:
histdel(){
for ...