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MySQL root access from all hosts
I've installed MySQL server on a remote Ubuntu machine. The root user is defined in the mysql.user table this way:
9 An...
How can I extract all values from a dictionary in Python?
...
If you want all of the values, use this:
dict_name_goes_here.values()
If you want all of the keys, use this:
dict_name_goes_here.keys()
IF you want all of the items (both keys and values), I would use this:
dict_name_goes_here.ite...
Entity Framework - Start Over - Undo/Rollback All Migrations
...oint where I just want to start over, so is there a way to completely undo all migrations, erase the history, and delete the migration code, so I'm back to square one?
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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 ...
Colspan all columns
How can I specify a td tag should span all columns (when the exact amount of columns in the table will be variable/difficult to determine when the HTML is being rendered)? w3schools mentions you can use colspan="0" , but it doesn't say exactly what browsers support that value (IE 6 is in our li...
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...