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How to set auto increment primary key in PostgreSQL?
I have a table in PostgreSQL with 22 columns, and I want to add an auto increment primary key.
7 Answers
...
What's the difference between size_t and int in C++?
...t is unsigned. Many stdlib functions, including malloc, sizeof and various string operation functions use size_t as a datatype.
An int is signed by default, and even though its size is also platform dependant, it will be a fixed 32bits on most modern machine (and though size_t is 64 bits on 64-bits...
SQL Server: Get data for only the past year
...Which:
Gets now's datetime GETDATE() = #8/27/2008 10:23am#
Converts to a string with format 101 CONVERT(varchar, #8/27/2008 10:23am#, 101) = '8/27/2007'
Converts to a datetime CONVERT(datetime, '8/27/2007') = #8/27/2008 12:00AM#
Subtracts 1 year DATEADD(yy, -1, #8/27/2008 12:00AM#) = #8/27/2007 12...
How to capture stdout output from a Python function call?
...
Try this context manager:
from io import StringIO
import sys
class Capturing(list):
def __enter__(self):
self._stdout = sys.stdout
sys.stdout = self._stringio = StringIO()
return self
def __exit__(self, *args):
self.extend(s...
Assert an object is a specific type
...to say here... Try to change the instanceOf(BaseClass.class) to instanceOf(String.class) and you'll see that it compile just fine but there will be an AssertionError thrown.
– maba
Sep 3 '14 at 11:39
...
Format / Suppress Scientific Notation from Python Pandas Aggregation Results
...wer I linked in the comments is not very helpful. You can specify your own string converter like so.
In [25]: pd.set_option('display.float_format', lambda x: '%.3f' % x)
In [28]: Series(np.random.randn(3))*1000000000
Out[28]:
0 -757322420.605
1 -1436160588.997
2 -1235116117.064
dtype: floa...
Necessary to add link tag for favicon.ico?
...like PNG check out this question.
For cache busting purposes:
Add a query string to the path for cache-busting purposes:
<link rel="icon" href="/favicon.ico?v=1.1">
Favicons are very heavily cached and this a great way to ensure a refresh.
Footnote about default location:
As far as th...
How to hide soft keyboard on android after clicking outside EditText?
... You can write a method that iterates through every View in your activity, and check if it is an instanceof EditText if it is not register a setOnTouchListener to that component and everything will fall in place. In case you are wondering how to do that, it is in fact quite simple. Here is what you ...
Looping through localStorage in HTML5 and JavaScript
...u could store a JSON-serialized array:
localStorage.setItem("words", JSON.stringify(["Lorem", "Ipsum", "Dolor"]));
The draft spec claims that any object that supports structured clone can be a value. But this doesn't seem to be supported yet.
EDIT: To load the array, add to it, then store:
var...
Get the name of an object's type
...ion (.{1,})\(/;
var results = (funcNameRegex).exec((this).constructor.toString());
return (results && results.length > 1) ? results[1] : "";
};
Now, all of your objects will have the function, getName(), that will return the name of the constructor as a string. I have tested this i...