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How can I drop all the tables in a PostgreSQL database?
...web2py), using the former caused problems:
<class 'psycopg2.ProgrammingError'> no schema has been selected to create in
So to my mind the fully correct answer is:
DROP SCHEMA public CASCADE;
CREATE SCHEMA public;
GRANT ALL ON SCHEMA public TO postgres;
GRANT ALL ON SCHEMA public TO public...
How to grep (search) committed code in the Git history
...p <expression> will work if you run into an "Argument list too long" error.
If you want to limit the search to some subtree (for instance, "lib/util"), you will need to pass that to the rev-list subcommand and grep as well:
git grep <regexp> $(git rev-list --all -- lib/util) -- lib/uti...
Google Maps: How to create a custom InfoWindow?
The default Google Maps InfoWindow for a map marker is very round. How do I create a custom InfoWindow with square corners?
...
How to use Swift @autoclosure
...ue"
If we omit the braces, we are passing in an expression and that's an error:
f(pred: 2 > 1)
// error: '>' produces 'Bool', not the expected contextual result type '() -> Bool'
@autoclosure creates an automatic closure around the expression. So when the caller writes an expression li...
make arrayList.toArray() return more specific types
So, normally ArrayList.toArray() would return a type of Object[] ....but supposed it's an
Arraylist of object Custom , how do I make toArray() to return a type of Custom[] rather than Object[] ?
...
How does BLAS get such extreme performance?
Out of curiosity I decided to benchmark my own matrix multiplication function versus the BLAS implementation... I was to say the least surprised at the result:
...
No appenders could be found for logger(log4j)?
...ate to the folder that contains your log4j.properties file
Apply
Run
The error message should no longer appear.
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Sublime Text 2 keyboard shortcut to open file in specified browser (e.g. Chrome)
... @NeilMonroe Activate logging commands in the console to see possible errors sublime.log_commands(True)
– aanton
Oct 21 '14 at 9:56
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O(nlogn) Algorithm - Find three evenly spaced ones within binary string
I had this question on an Algorithms test yesterday, and I can't figure out the answer. It is driving me absolutely crazy, because it was worth about 40 points. I figure that most of the class didn't solve it correctly, because I haven't come up with a solution in the past 24 hours.
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How to wait for a keypress in R?
...hod is that if you type something that is not a number, it will display an error.
print ("Press [enter] to continue")
number <- scan(n=1)
Wrapping into a function:
readkey <- function()
{
cat("[press [enter] to continue]")
number <- scan(n=1)
}
Method 3
Imagine you want to wa...