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How to print a number with commas as thousands separators in JavaScript
...th commas as thousands separators. For example, I want to show the number 1234567 as "1,234,567". How would I go about doing this?
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Is there a difference between foreach and map?
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295
Different.
foreach iterates over a list and applies some operation with side effects to each ...
Pandas DataFrame column to list [duplicate]
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270
You can use the Series.to_list method.
For example:
import pandas as pd
df = pd.DataFrame({...
SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed
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Finding quaternion representing the rotation from one vector to another
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Quaternion q;
vector a = crossproduct(v1, v2);
q.xyz = a;
q.w = sqrt((v1.Length ^ 2) * (v2.Length ^ 2)) + dotproduct(v1, v2);
Don't forget to normalize q.
Richard is right about there not being a unique rotation, but the above should give the "shortest arc," which ...
What's the right OAuth 2.0 flow for a mobile app
...implement delegated authorization in a Web API for mobile apps using OAuth 2.0. According to specification, the implicit grant flow does not support refresh tokens, which means once an access token is granted for an specific period of time, the user must grant permissions to the app again once the t...
How to compare binary files to check if they are the same?
... diff will show if the files are the same or not:
[me@host ~]$ diff 1.bin 2.bin
Binary files 1.bin and 2.bin differ
If there is no output from the command, it means that the files have no differences.
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Convert HashBytes to VarChar
I want to get the MD5 Hash of a string value in SQL Server 2005. I do this with the following command:
7 Answers
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Dynamically select data frame columns using $ and a character value
...s a reproducible example below:
# set seed for reproducibility
set.seed(123)
df <- data.frame( col1 = sample(5,10,repl=T) , col2 = sample(5,10,repl=T) , col3 = sample(5,10,repl=T) )
# We want to sort by 'col3' then by 'col1'
sort_list <- c("col3","col1")
# Use 'do.call' to call order. Se...
How can I do DNS lookups in Python, including referring to /etc/hosts?
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edited Mar 7 '19 at 22:59
Justin M. Keyes
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