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Concatenating two one-dimensional NumPy arrays
...to concatenate need to passed in as a sequence, not as separate arguments.
From the NumPy documentation:
numpy.concatenate((a1, a2, ...), axis=0)
Join a sequence of arrays together.
It was trying to interpret your b as the axis parameter, which is why it complained it couldn't convert it into a sc...
ssh remote host identification has changed
...
ssh-keygen -R <host>
For example,
ssh-keygen -R 192.168.3.10
From ssh-keygen man page:
-R hostname Removes all keys belonging to hostname from a known_hosts file. This option is useful to delete hashed hosts (see the -H option above).
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“use database_name” command in PostgreSQL
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The basic problem while migrating from MySQL I faced was, I thought of the term database to be same in PostgreSQL also, but it is not. So if we are going to switch the database from our application or pgAdmin, the result would not be as expected.
As in my cas...
PHP function to generate v4 UUID
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Taken from this comment on the PHP manual, you could use this:
function gen_uuid() {
return sprintf( '%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
// 32 bits for "time_low"
mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ),...
detach all packages while working in R
... invisible(*) is not necessary but can be useful to prevent the NULL reply from vertically spamming the R window.
(edit: 9/20/2019) In version 3.6.1
It may be helpful to convert loaded only names(sessionInfo()$loadedOnly) to explicitly attached packages first, and then detach the packages, as so.
la...
Good geometry library in python? [closed]
...kein), I'm using the cffi module and some awful hacks to use CGAL directly from python, using inline C++ snippets.
– Paul Harrison
Nov 13 '12 at 22:36
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What is the difference between save and insert in Mongo DB?
...orms an update, replacing all field in the existing record with the fields from the document.
Save vs Update :
update modifies an existing document matched with your query params. If there is no such matching document, that's when upsert comes in picture.
upsert : false : Nothing happens when no ...
Error handling with node.js streams
...l you have to do is :
include the stream module
instantiate ( or inherit from) the Transform class
implement a _transform method which takes a (chunk, encoding, callback).
The chunk is your data. Most of the time you won't need to worry about encoding if you are working in objectMode = true. T...
Is there a fixed sized queue which removes excessive elements?
... };
If the "removeEldestEntry" returns true, the eldest entry is removed from the map.
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How do I list all remote branches in Git 1.7+?
... This answer is correct but misleading, the first thing users coming here from search engines should see is: git branch -r since that is the correct and simplest answer, the asker had a special case where he modified the behavior of his git branch -r that most users coming here won't have
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