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What is the equivalent of MATLAB's repmat in NumPy
...le asking to manipulate the input matrix along the dimensions the matrix already has.
Thus the two commands
repmat(M,m,n) % matlab
np.tile(M,(m,n)) # python
are really equivalent for a matrix of rank 2 (two dimensions).
The matters goes counter-intuitive when you ask for repetition/tiling o...
When should I really use noexcept?
...re as to when I should consider using it in practice. Based on what I have read so far, the last-minute addition of noexcept seems to address some important issues that arise when move constructors throw. However, I am still unable to provide satisfactory answers to some practical questions that l...
Is there a Java API that can create rich Word documents? [closed]
...ork).
OpenOffice UNO also lets you build MS-Office-compatible charts, spreadsheets, presentations, etc. We were able to dynamically build sophisticated Word documents, including charts and tables.
We simplified the process by using template MS-Word documents with bookmark inserts into which t...
Guava equivalent for IOUtils.toString(InputStream)
Apache Commons IO has a nice convenience method IOUtils.toString() to read an InputStream to a String.
9 Answers
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How do you find the disk size of a Postgres / PostgreSQL table and its indexes
... ELSE 'N'
END AS UNIQUE,
idx_scan AS number_of_scans,
idx_tup_read AS tuples_read,
idx_tup_fetch AS tuples_fetched
FROM pg_tables t
LEFT OUTER JOIN pg_class c ON t.tablename=c.relname
LEFT OUTER JOIN
( SELECT c.relname AS ctablename, ipg.relname AS indexname, x.indnatts AS numbe...
PostgreSQL - how to quickly drop a user with existing privileges
...
Andrew, best to read the documentation for clarification. DROP OWNED BY will drop tables owned by that user. REASSIGN OWNED BY will reassign those tables to a different user. Choose one.
– Tim Kane
Fe...
Are list-comprehensions and functional functions faster than “for loops”?
...e visual complexity of the code).
Chances are, if code like this isn't already fast enough when written in good non-"optimized" Python, no amount of Python level micro optimization is going to make it fast enough and you should start thinking about dropping to C. While extensive micro optimization...
Constantly print Subprocess output while process is running
...iter to process lines as soon as the command outputs them: lines = iter(fd.readline, ""). Here's a full example showing a typical use case (thanks to @jfs for helping out):
from __future__ import print_function # Only Python 2.x
import subprocess
def execute(cmd):
popen = subprocess.Popen(cmd,...
How to pass the value of a variable to the stdin of a command?
...first line(s) will be the contents of $var but the rest will come from cat reading its standard input. If the command does not do anything too fancy (try to turn on command line editing, or run like vim does) then it will be fine. Otherwise, you need to get really fancy - I think expect or one of ...
Why does C# allow {} code blocks without a preceding statement?
...erface implementation written in another language, and that implementation reads the variable before writing it.
– supercat
Jul 14 '15 at 17:25
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