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How to UPSERT (MERGE, INSERT … ON DUPLICATE UPDATE) in PostgreSQL?
...ch other; one of them successfully INSERTs; the other gets a duplicate key error and does an UPDATE instead. The UPDATE blocks waiting for the INSERT to rollback or commit. When it rolls back, the UPDATE condition re-check matches zero rows, so even though the UPDATE commits it hasn't actually done ...
Make Bootstrap Popover Appear/Disappear on Hover instead of Click
...cript>
– Muhambi
Sep 9 '12 at 23:05
8
@Jake: Use $("#popover").popover({ trigger: "hover" });....
Why do loggers recommend using a logger per class?
...ImportantLogs" />
<logger name="StupidLibrary.*" minlevel="Error" writeTo="StupidLibraryLogs" />
<!-- Hide other messages from StupidLibrary -->
<logger name="StupidLibrary.*" final="true" />
<!-- Log all but hidden messages -->
<logger name="*" writeTo="Al...
Read file from line 2 or skip header row
... files.
– CppLearner
Feb 5 '18 at 2:05
1
The slice also builds a copy of the contents. This is ju...
Move assignment operator and `if (this != &rhs)`
In the assignment operator of a class, you usually need to check if the object being assigned is the invoking object so you don't screw things up:
...
Replace all non Alpha Numeric characters, New Lines, and multiple White Space with one Space
...
answered Jan 1 '14 at 2:05
Casimir et HippolyteCasimir et Hippolyte
81.7k55 gold badges8181 silver badges109109 bronze badges
...
Moving from CVS to Git: $Id$ equivalent?
...
What is git co supposed to do? I got the error message "git: 'co' is not a git command. See 'git --help'." Should it be git checkout?
– Peter Mortensen
Jul 28 '18 at 19:51
...
Should one call .close() on HttpServletResponse.getOutputStream()/.getWriter()?
...vlet. It throws an exception. The exception is mapped in the web.xml to an error JSP:
package ser;
import java.io.*;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.*;
@WebServlet(name = "Erroneous", urlPatterns = {"/Erroneous"})
publi...
How can I return two values from a function in Python?
...ork returns a UnmarshalResult which is a namedtuple. So you can do:
data, errors = MySchema.loads(request.json())
if errors:
...
or
result = MySchema.loads(request.json())
if result.errors:
...
else:
# use `result.data`
In other cases you may return a dict from your function:
def ...
difference between variables inside and outside of __init__()
...|
edited Apr 28 '19 at 16:05
Adrian W
2,81788 gold badges2626 silver badges3030 bronze badges
answered M...