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Cosmic Rays: what is the probability they will affect a program?
...dies by IBM in the 1990s suggest that computers typically experience about one cosmic-ray-induced error per 256 megabytes of RAM per month.[15]
This means a probability of 3.7 × 10-9 per byte per month, or 1.4 × 10-15 per byte per second. If your program runs for 1 minute and occupies 20 MB of R...
Erlang's 99.9999999% (nine nines) reliability
...read that right, 99.9999999%). Let’s put this in context: 5 nines is reckoned to be good (5.2 minutes of downtime/year). 7 nines almost unachievable ... but we did 9.
Why is this? No shared state, plus a sophisticated error recovery model.
If you dig a bit deeper, in the PhD thesis written by Joe...
HTML text input allow only numeric input
... this.oldSelectionStart = this.selectionStart;
this.oldSelectionEnd = this.selectionEnd;
} else if (this.hasOwnProperty("oldValue")) {
this.value = this.oldValue;
this.setSelectionRange(this.oldSelectionStart, this.oldSelectionEnd);
} else {
this.valu...
What is the purpose of Looper and how to use it?
...ve seen it in a lot of places but unable to understand its purpose. Can anyone help me by defining the purpose of Looper and also by giving a simple example if possible?
...
What is the difference between Left, Right, Outer and Inner Joins?
...t table you specify in a join, Students, is the LEFT table, and the second one, Lockers, is the RIGHT table.
Each student can be assigned to a locker, so there is a LockerNumber column in the Student table. More than one student could potentially be in a single locker, but especially at the beginni...
How to check for a valid URL in Java?
... UrlValidator to work with our wierd intranet top level domain. The common ones like .com, .org, and such works. I am not interested in creating a RegExp for this matter so the new URL(name).toURI() become the solution.
– Avec
Apr 30 '19 at 15:14
...
When to use RSpec let()?
... means that if you fat finger the spelling of the instance variable, a new one will be created and initialized to nil, which can lead to subtle bugs and false positives. Since let creates a method, you'll get a NameError when you misspell it, which I find preferable. It makes it easier to refactor...
Different names of JSON property during serialization and deserialization
Is it possible: to have one field in class, but different names for it during serialization/deserialization in Jackson library?
...
Inline labels in Matplotlib
...s plt
import numpy as np
from scipy import ndimage
def my_legend(axis = None):
if axis == None:
axis = plt.gca()
N = 32
Nlines = len(axis.lines)
print Nlines
xmin, xmax = axis.get_xlim()
ymin, ymax = axis.get_ylim()
# the 'point of presence' matrix
pop =...
Are there any worse sorting algorithms than Bogosort (a.k.a Monkey Sort)? [closed]
...ms this morning. We reminisced about our favorites like StupidSort , and one of us was sure we had seen a sort algorithm that was O(n!) . That got me started looking around for the "worst" sorting algorithms I could find.
...