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How to add an extra column to a NumPy array
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I think a more straightforward solution and faster to boot is to do the following:
import numpy as np
N = 10
a = np.random.rand(N,N)
b = np.zeros((N,N+1))
b[:,:-1] = a
And timings:
In [23]: N = 10
In [24]: a = np.random.rand(N,N)
In [25]: %timeit b = np.hstac...
How to get a list of installed Jenkins plugins with name and version pair
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Worked well for me on Mac OS X. I wanted to convert the output to a plain text list, so used some Perl regex to strip the tags: curl 'http://192.168.197.133:8080/pluginManager/api/xml?depth=1&xpath=/*/*/shortName|/*/*/version&wrapper=plugins' | perl -pe 's/.*?&...
Create PostgreSQL ROLE (user) if it doesn't exist
...catch only this one error. As other answers mentioned it is a good idea to convert fatal error to simple notice. Other PostgreSQL IF NOT EXISTS commands adds , skipping into their message, so for consistency I'm adding it here too.
Here is full SQL code for simulation of CREATE ROLE IF NOT EXISTS w...
How to annotate MYSQL autoincrement field with JPA annotations
...ect Operator into MySQL DB.
Prior to save, I try to select from this table and it works, so is connection to db.
10 Answers...
How to calculate the number of occurrence of a given character in each row of a column of strings?
... Sorry I was unclear. I was actually responding to tim riffe and telling him that his function threw an error with the problem posed. He may have used your redefinition of the problem but he didn't say so.
– IRTFM
Sep 14 '12 at 20:14
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What is the fastest way to create a checksum for large files in C#
... is that SHA256Managed reads 4096 bytes at a time (inherit from FileStream and override Read(byte[], int, int) to see how much it reads from the filestream), which is too small a buffer for disk IO.
To speed things up (2 minutes for hashing 2 Gb file on my machine with SHA256, 1 minute for MD5) wra...
Why does a RegExp with global flag give wrong results?
...'.match(re); // -> true
!!'Foo Bar'.match(re); // -> true
Note: !! converts it to a boolean and then inverts the boolean so it reflects the result.
Alternatively, you could just reset the lastIndex property:
result.push(re.test('Foo Bar'));
re.lastIndex = 0;
result.push(re.test('Foo Bar'))...
Visual Studio debugging “quick watch” tool and lambda expressions
...ariables become fields on compiler-generated classes), with a bit of smoke and mirrors.
As such, I'm not in the least surprised that you can't use them idly - there is a lot of compiler work (and type generation behind the scenes) that supports this magic.
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What is the difference between `let` and `var` in swift?
...56329
EDIT
Because comments asking for adding other facts to the answer, converting this to community wiki answer. Feel free edit the answer to make it better.
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PHP Pass by reference in foreach [duplicate]
...ill become a normal variable (Since no one else is pointing to $a[0] it is converted to a normal variable. PHP is smart enough to make it a normal variable when no one else is pointing towards it)
This is what happens in the first loop
foreach ($a as &$v) {
}
After the last iteration $a[3...