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How to organize large R programs?
...s top-level namespace (the one that ls() shows).
I was trying to simulate Python's system, where every file is a module. That would be better to have, but this seems OK.
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Inserting a Link to a Webpage in an IPython Notebook
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In case it is not a markdown cell, that is with what I went:
from IPython.core.display import display, HTML
display(HTML("""<a href="https://google.at">text</a>"""))
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How can I get the sha1 hash of a string in node.js?
...S is hashing the UTF-8 representation of the string. Other languages (like Python, PHP or PERL...) are hashing the byte string.
We can add binary argument to use the byte string.
const crypto = require("crypto");
function sha1(data) {
return crypto.createHash("sha1").update(data, "binary").dig...
What is a lambda (function)?
... nice way to write closures. With that power you can do things like this.
Python
def adder(x):
return lambda y: x + y
add5 = adder(5)
add5(1)
6
As you can see from the snippet of Python, the function adder takes in an argument x, and returns an anonymous function, or lambda, that takes anoth...
App Inventor 2 项目合并工具 AIMerge · App Inventor 2 中文网
...后将它们合并在一起。请记住，整个组合应用程序仍然受到 App Inventor 建议的总共最多 10 个屏幕的限制。
本文档概述了使用 App Inventor 合并工具在团队环境中开发应用程序的过程。它将使用由两个不同开发人员开发的简单双屏...
What is the most efficient way to create a dictionary of two pandas Dataframe columns?
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In Python 3.6 the fastest way is still the WouterOvermeire one. Kikohs' proposal is slower than the other two options.
import timeit
setup = '''
import pandas as pd
import numpy as np
df = pd.DataFrame(np.random.randint(32, 12...
Finding what branch a Git commit came from
...m to be maintained anymore.
git-when-merged is an alternative written in Python that's working very well for me.
It is based on "Find merge commit which include a specific commit".
git when-merged [OPTIONS] COMMIT [BRANCH...]
Find when a commit was merged into one or more branches.
Find...
Handle file download from ajax post
... need to carefully set few things at the server side. I set few headers in Python Django HttpResponse. You need to set them accordingly if you use other programming languages.
# In python django code
response = HttpResponse(file_content, content_type="application/vnd.openxmlformats-officedocument.s...
Convert pandas timezone-aware DateTimeIndex to naive timestamp, but in certain timezone
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Late contribution but just came across something similar in Python datetime and pandas give different timestamps for the same date.
If you have timezone-aware datetime in pandas, technically, tz_localize(None) changes the POSIX timestamp (that is used internally) as if the local time ...
How to perform OR condition in django queryset?
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Because QuerySets implement the Python __or__ operator (|), or union, it just works. As you'd expect, the | binary operator returns a QuerySet so order_by(), .distinct(), and other queryset filters can be tacked on to the end.
combined_queryset = User.obje...