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Getting error: Peer authentication failed for user “postgres”, when trying to get pgsql working with
....conf file (/etc/postgresql/9.1/main/pg_hba.conf*).
This line:
local all postgres peer
Should be:
local all postgres md5
* If you can't find this file, running locate pg_hba.conf should show you where ...
Copy all files with a certain extension from all subdirectories
Under unix, I want to copy all files with a certain extension (all excel files) from all subdirectories to another directory. I have the following command:
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Any shortcut to initialize all array elements to zero?
...you can use java.util.Arrays.fill() (which will of course use a loop internally).
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grant remote access of MySQL database from any IP address
...this article is for you.
ERROR 1130 (HY000): Host ‘1.2.3.4’ is not allowed to connect to this
MySQL server
Change mysql config
Start with editing mysql config file
vim /etc/mysql/my.cnf
Comment out following lines.
#bind-address = 127.0.0.1
#skip-networking
If you do not...
How to find all combinations of coins when given some dollar value
...or this, and contains a fairly extensive discussion of the problem. Essentially you define a polynomial where the nth coefficient is the number of ways of making change for n dollars.
Pages 4-5 of the writeup show how you can use Mathematica (or any other convenient computer algebra system) to comp...
What is “2's Complement”?
...lement.
To understand, you have to think of the numbers in binary.
It basically says,
for zero, use all 0's.
for positive integers, start counting up, with a maximum of 2(number of bits - 1)-1.
for negative integers, do exactly the same thing, but switch the role of 0's and 1's (so instead of start...
List of all index & index columns in SQL Server DB
How do I get a list of all index & index columns in SQL Server 2005+? The closest I could get is:
30 Answers
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Test for equality among all elements of a single vector
I'm trying to test whether all elements of a vector are equal to one another. The solutions I have come up with seem somewhat roundabout, both involving checking length() .
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What does axis in pandas mean?
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Usually axis=0 is said to be "column-wise" (and axis=1 "row-wise"), I think "along the rows" is confusing. (Nice "pic" though :) )
– Andy Hayden
Mar 3 '14 at 17:43
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Turn off constraints temporarily (MS SQL)
I'm looking for a way to temporarily turn off all DB's constraints (eg table relationships).
5 Answers
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