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PostgreSQL database default location on Linux
... server.
The location of the data directory depends on the distribution. If you install from source, the default is /usr/local/pgsql/data:
In file system terms, a database
cluster will be a single directory
under which all data will be stored.
We call this the data directory or
data ar...
How to test if a string is JSON or not?
... @Zalaboza 1234, 0, false, and null are all valid JSON values. If you want a predicate that tests if the JSON represents an object you'll need to do a little more.
– Michael Lang
Nov 18 '15 at 23:15
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Find all records which have a count of an association greater than zero
...
Well that is Rails for you. If you can provide an sql answer (and explain why this isn't efficient), that may be a lot more helpful.
– jvnill
May 7 '19 at 23:17
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How to check if a string starts with a specified string? [duplicate]
I'm trying to check if a string starts with http . How can I do this check?
6 Answers
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OwinStartup not firing
...uiring these direct references of the Microsoft.Owin stuff? How do we specifically provoke Katana to call Startup.Configuration(IAppBuilder)?
– Jason Kleban
Jan 13 '15 at 16:17
7
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Can PNG image transparency be preserved when using PHP's GDlib imagecopyresampled?
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This solution, in my case GD works fine ONLY if PNG has a "regular" transparency area, like a surrounding transparent area, if it has a complex area, like with inner parts of the image with transparency, it always fails and puts black background, for example this image ...
How do I calculate someone's age in Java?
I want to return an age in years as an int in a Java method.
What I have now is the following where getBirthDate() returns a Date object (with the birth date ;-)):
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Modulo operation with negative numbers
...mple A. 5/(-3) is -1
=> (-1) * (-3) + 5%(-3) = 5
This can only happen if 5%(-3) is 2.
Example B. (-5)/3 is -1
=> (-1) * 3 + (-5)%3 = -5
This can only happen if (-5)%3 is -2
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How to remove files that are listed in the .gitignore but still on the repository?
...rom the repository manually:
git rm --cached file1 file2 dir/file3
Or, if you have a lot of files:
git rm --cached `git ls-files -i --exclude-from=.gitignore`
But this doesn't seem to work in Git Bash on Windows. It produces an error message. The following works better:
git ls-files -i --ex...
Pickle incompatibility of numpy arrays between Python 2 and 3
...ject, which is assumed to be ASCII, while in this case it is binary data. If this is a bug in the Python 3 unpickler, or a "misuse" of the pickler by numpy, I don't know.
Here is something of a workaround, but I don't know how meaningful the data is at this point:
import pickle
import gzip
import...