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Get PostGIS version
...s like GEOS and proj4 you might want to get their versions too. Then use:
SELECT PostGIS_full_version();
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Why do you need ./ (dot-slash) before executable or script name to run it in bash?
...t having the current directory on that list is security.
Let's say you're root and go into another user's directory and type sl instead of ls. If the current directory is in PATH, the shell will try to execute the sl program in that directory (since there is no other sl program). That sl program mi...
Difference between java.util.Random and java.security.SecureRandom
...random (two slashes after colon for file protocol, then one more slash for root of filesystem), causing it to fall back to /dev/random, which caused problems with entropy pool exhaustion. Couldn't edit it, so had to set a system property java.security.egd to the right one at app startup.
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How to test if string exists in file with Bash?
...newlines, any of which is to be matched.
-x, --line-regexp
Select only those matches that exactly match the whole line.
-q, --quiet, --silent
Quiet; do not write anything to standard output. Exit immediately with zero status if any match is found, even if an error ...
What exactly does the enable-background attribute do?
... still support the feature, but we had to disable support when used on the root <svg> element due to Inkscape adding it on every file (causing perf issues). As of today, other browsers still do not support In1/In2=BackgroundImage though, only IE and Edge do.
– FremyCompan...
sql ORDER BY multiple values in specific order?
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You can order by a selected column or other expressions.
Here an example, how to order by the result of a case-statement:
SELECT col1
, col2
FROM tbl_Bill
WHERE col1 = 0
ORDER BY -- order by case-statement
CASE WHEN tbl_Bi...
How to get default gateway in Mac OSX
...the first line; one with default at its first column.
To display only the selected lines of result, we can use grep command along with netstat
netstat -rn | grep 'default'
This command filters and displays those lines of result having default. In this case, you can see result like following:
de...
Installing Java 7 on Ubuntu
...ther JDK versions installed
sudo update-alternatives --config java
then select the Java 7 version.
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Visual Studio: How can I see the same file in two separate tab groups?
...have two copies of the same file. Then you can right-click the tab bar and select New Vertical Tab Group (or New Horizontal Tab Group, the one you like more).
Hope I understood you question..
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Why is jquery's .ajax() method not sending my session cookie?
...nful hours. What a perfect answer! Thanks! I needed to add these in public root .htaccess of my website: <IfModule mod_headers.c> Header set Access-Control-Allow-Origin "localhost" Header set Access-Control-Allow-Credentials "true" </IfModule>
– Vinay Vissh
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