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An example of how to use getopts in bash
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getopt vs getopts .. very different cross platform compliance
– shadowbq
Jan 29 at 14:29
add a comment
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What are some (concrete) use-cases for metaclasses?
... cumbersome, redundant and error prone:
class B(A):
bar = String()
# vs.
class B(A):
bar = String('bar')
_fields = {'B.bar': bar, 'A.foo': A.foo}
Having considered the most common and concrete use cases, the only cases where you absolutely HAVE to use metaclasses are when you want ...
PHP parse/syntax errors; and how to solve them
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community wiki
13 revs, 4 users 86%mario
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Peak signal detection in realtime timeseries data
...) - y(t+dt) > m)
where dt and m are parameters to control sensitivity vs time-delay
This is what you get with the mentioned algorithm:
here is the code to reproduce the plot in python:
import numpy as np
import matplotlib.pyplot as plt
input = np.array([ 1. , 1. , 1. , 1. , 1. , 1. , ...
What does f+++++++++ mean in rsync logs?
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I'm a couple of years late, but "t" vs "T" is explained in the man page: A t means the modification time is different and is being updated to the sender's value (requires --times). An alternate value of T means that the modification time will be set to the tran...
Using a piano keyboard as a computer keyboard [closed]
...r times it only has meaning combined with following strokes. (Think "good" vs. "good" followed by "bye"). Although they'll be heavily influenced by the school at which they studied, each stenographer will have their own "dictionary" of what strokes they use to mean what, a dictionary they will conti...
Relative imports in Python 2.7
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Script vs. Module
Here's an explanation. The short version is that there is a big difference between directly running a Python file, and importing that file from somewhere else. Just knowing what directory a file is in does not d...
Fundamental difference between Hashing and Encryption algorithms
...dress the points mentioned in the edited question.
1. When to use hashes vs encryptions
Hashing is useful if you want to send someone a file. But you are afraid that someone else might intercept the file and change it. So a
way that the recipient can make sure that it is the right file is if
you ...
Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_
... for the processor to parallelize different loop iterations.
The unsigned vs. uint64_t and other tweaks don't directly affect the problem. But they influence the register allocator which assigns the registers to the variables.
In your case, the speeds are a direct result of what is stuck to the (f...
What is the correct way of using C++11's range-based for?
...t's start differentiating between observing the elements in the container
vs. modifying them in place.
Observing the elements
Let's consider a simple example:
vector<int> v = {1, 3, 5, 7, 9};
for (auto x : v)
cout << x << ' ';
The above code prints the elements (ints) in...