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How to sum up an array of integers in C#
...essorCount };
Parallel.ForEach(Partitioner.Create(0, arr.Length), options, range =>
{
long localSum = 0;
for (int i = range.Item1; i < range.Item2; i++)
{
localSum += arr[i];
}
Interlocked.Add(ref sum, localSum);
});
...
How to determine the longest increasing subsequence using dynamic programming?
...ubsequence_ending_with = []
current_best_end = 0
for curr_elem in range(len(sequence)):
# It's always possible to have a subsequence of length 1.
longest_subsequence_ending_with.append(1)
# If a subsequence is length 1, it doesn't have a backrefe...
“To Do” list before publishing Android app to market [closed]
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No, the raw source doesn't get shipped. The .apk file is just a .zip file in disguise, so rename it and take a look. Anything in /assets and /res/raw gets shipped unaltered, as do the drawables in /res. The xml files in /res are mang...
Simple way to create matrix of random numbers
...
You can drop the range(len()):
weights_h = [[random.random() for e in inputs[0]] for e in range(hiden_neurons)]
But really, you should probably use numpy.
In [9]: numpy.random.random((3, 3))
Out[9]:
array([[ 0.37052381, 0.03463207, 0.10...
Is it safe to parse a /proc/ file?
.../tcp, you can read it and parse each line without fear. But if you try to draw any conclusions from multiple lines at once -- beware, other processes and the kernel are changing it while you read it, and you are probably creating a bug.
...
Generate a random point within a circle (uniformly)
...dom()+random() generates radii more likely to be around 1.0 but lie in the range 0.0-2.0. When folded down they're more likely to be around 1.0 and always in the range 0.0-1.0. What's more, it's exactly the proportion needed in the first sentence of this comment. Just halving produces more numbers a...
setting y-axis limit in matplotlib
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One thing you can do is to set your axis range by yourself by using matplotlib.pyplot.axis.
matplotlib.pyplot.axis
from matplotlib import pyplot as plt
plt.axis([0, 10, 0, 20])
0,10 is for x axis range.
0,20 is for y axis range.
or you can also use matplotlib....
Search for string and get count in vi editor
...: is on CLI(Command Line Interface)
%s specifies all lines. Specifying the range as % means do substitution in the entire file. Syntax for all occurrences substitution is :%s/old-text/new-text/g
g specifies all occurrences in the line. With the g flag , you can make the whole line to be substituted...
How to test if a double is an integer
... @JoelChristophel: Yes. Not all doubles with integer values are in the range of int, or even long, so that test won't work on them.
– Louis Wasserman
Dec 9 '15 at 17:24
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Iterate through pairs of items in a Python list [duplicate]
...
To do that you should do:
a = [5, 7, 11, 4, 5]
for i in range(len(a)-1):
print [a[i], a[i+1]]
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