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Conveniently Declaring Compile-Time Strings in C++
...lete-looking library is metaparse. Essentially, you can define any mapping from literal strings to types, and implement it with this kind of technology.
– Aaron McDaid
Jul 13 '15 at 18:31
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Display image as grayscale using matplotlib
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The following code will load an image from a file image.png and will display it as grayscale.
import numpy as np
import matplotlib.pyplot as plt
from PIL import Image
fname = 'image.png'
image = Image.open(fname).convert("L")
arr = np.asarray(image)
plt.imshow(...
Which characters make a URL invalid?
...;">
The character "#" is excluded because it is used to delimit a URI from a fragment identifier. The percent character "%" is excluded because it is used for the encoding of escaped characters. In other words, the "#" and "%" are reserved characters that must be used in a specific context.
Li...
Can “using” with more than one resource cause a resource leak?
C# lets me do the following (example from MSDN):
5 Answers
5
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Thread pooling in C++11
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This is copied from my answer to another very similar post, hope it can help:
1) Start with maximum number of threads a system can support:
int Num_Threads = thread::hardware_concurrency();
2) For an efficient threadpool implementation...
Get item in the list in Scala?
How in the world do you get just an element at index i from the List in scala?
4 Answers
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Change old commit message on Git
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I did that, and then commits from other branches show up in my branch
– Reza
Jul 20 at 19:18
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How do I exclude all instances of a transitive dependency when using Gradle?
...ributes - group and module. However, the above syntax doesn't prevent you from specifying any arbitrary property as a predicate. When trying to exclude from an individual dependency you cannot specify arbitrary properties. For example, this fails:
dependencies {
compile ('org.springframework.dat...
Encrypting & Decrypting a String in C# [duplicate]
... salt and IV is prepended to the cipher text upon encryption and extracted from it again in order to perform the decryption. The result of this is that encrypting the exact same plaintext with the exact same password gives and entirely different ciphertext result each time.
The "strength" of using...
When do I need to use AtomicBoolean in Java?
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Here is the notes (from Brian Goetz book) I made, that might be of help to you
AtomicXXX classes
provide Non-blocking Compare-And-Swap implementation
Takes advantage of the support provide
by hardware (the CMPXCHG instruction
on Intel) When ...