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Rails: FATAL - Peer authentication failed for user (PG::Error)
...o check the version of postgres if multiple versions are available
psql=# select VERSION();
PostgreSQL 9.1.13 on x86_64-unk.... # so version is 9.1
Now Open postgres user
vim /etc/postgresql/9.1/main/pg_hba.conf
9.1 is version return form upper command
and replace
local all ...
What is the difference between “JPG” / “JPEG” / “PNG” / “BMP” / “GIF” / “TIFF” Image?
...ow demonstrate the noticeable artifacting of lossy compression algorithms; select the thumbnail image to view the full size version.
Each format is different as described below:
JPEG
JPEG (Joint Photographic Experts Group) files are (in most cases) a lossy format; the DOS filename extension is JPG...
How to write an XPath query to match two attributes?
...
//div[@id='..' and @class='...]
should do the trick. That's selecting the div operators that have both attributes of the required value.
It's worth using one of the online XPath testbeds to try stuff out.
sha...
What is a magic number, and why is it bad? [closed]
...Now, what you do is you have the 50 in different places - your SQL script (SELECT TOP 50 * FROM orders), your Website (Your Last 50 Orders), your order login (for (i = 0; i < 50; i++)) and possibly many other places.
Now, what happens when someone decides to change 50 to 25? or 75? or 153? You n...
B-Tree vs Hash Table
...faster than with a tree algorithm (O(1) instead of log(n)), but you cannot select ranges (everything in between x and y).
Tree algorithms support this in Log(n) whereas hash indexes can result in a full table scan O(n).
Also the constant overhead of hash indexes is usually bigger (which is no factor...
Clustered vs Non-Clustered
...
Some db with some nasty selects, joins in a stored procedure - only diffrence is the index
INDEXES - clustered vs nonclustered
891 rows
10 sec
NONCLUSTERED
OR
891 rows
14 sec
CLUSTERED
...
What is the difference between “#!/usr/bin/env bash” and “#!/usr/bin/bash”?
...t more portable, but also increases the risk that the wrong interpreter is selected because it searches for a match in every directory on the executable search path. It also suffers from the same problem in that the path to the env binary may also be different on a per-machine basis."-Wikipedia
...
Git workflow and rebase vs merge questions
...lligent use of interactive rebase and tools like tortoisegit (which allows selection of which commits to include) will help a lot.
– prusswan
Jun 27 '12 at 11:02
8
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How can I mask a UIImageView?
..."UIImageViewWithMask" (custom class name above).
On Attributes Inspector: Select mask image you
want to use.
Example
Notes
Your mask image should have a transparent background (PNG) for the non-black part.
share
...
Hosting a Maven repository on github
...--------------------------------------
Visit github.com in your browser, select the mvn-repo branch, and verify that all your binaries are now there.
Congratulations!
You can now deploy your maven artifacts to a poor man's public repo simply by running mvn clean deploy.
There's one more step ...