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Convert unix time to readable date in pandas dataframe
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230
These appear to be seconds since epoch.
In [20]: df = DataFrame(data['values'])
In [21]: df.co...
Convert int to ASCII and back in Python
..., node 1 might be short.com/a , node 52 might be short.com/Z , and node 104 might be short.com/ZZ . When a user goes to that URL, I need to reverse the process (obviously).
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How to flatten only some dimensions of a numpy array
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Take a look at numpy.reshape .
>>> arr = numpy.zeros((50,100,25))
>>> arr.shape
# (50, 100, 25)
>>> new_arr = arr.reshape(5000,25)
>>> new_arr.shape
# (5000, 25)
# One shape dimension can be -1.
# In this case, the value is inferred from
# the le...
Changing names of parameterized tests
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302
This feature has made it into JUnit 4.11.
To use change the name of parameterized tests, you s...
rotating axis labels in R
...re's an example:
require(grDevices)
tN <- table(Ni <- stats::rpois(100, lambda=5))
r <- barplot(tN, col=rainbow(20), las=1)
That represents the style of axis labels. (0=parallel, 1=all horizontal, 2=all perpendicular to axis, 3=all vertical)
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How to revert a folder to a particular commit by creating a patch
...git checkout to update your repository to a specific state.
git checkout e095 -- somefolder
As for your question about generating the diff, that would work too. Just generate the diff to go from your current state back to e095:
git diff 89cd..e095 -- somefolder
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What is the difference between tree depth and height?
...ges from the node to the tree's root node.A root node will have a depth of 0.
The height of a node is the number of edges on the longest path from the node to a leaf.A leaf node will have a height of 0.
Properties of a tree:
The height of a tree would be the height of its root node,or equivalent...
Are “elseif” and “else if” completely synonymous?
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edited Sep 7 '10 at 20:40
answered Sep 7 '10 at 20:25
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What is the “reactor” in Maven?
...ven users. But it's still there and is used under the hood.
In September 2008 (i.e. a long time after the rollout of Maven 2), a reactor plugin has been created to make it possible to interact (again) more closely with the Maven reactor. Brett Porter blogged about it in Reactor: My New Favourite Ma...
What Makes a Method Thread-safe? What are the rules?
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140
If a method (instance or static) only references variables scoped within that method then it is ...