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psycopg2: insert multiple rows with one query
...s import execute_values
execute_values(cur,
"INSERT INTO test (id, v1, v2) VALUES %s",
[(1, 2, 3), (4, 5, 6), (7, 8, 9)])
Previous Answer:
To insert multiple rows, using the multirow VALUES syntax with execute() is about 10x faster than using psycopg2 executemany(). Indeed, executemany(...
JavaScript module pattern with example [closed]
...g optimized file requires the loader library (just re-checked it with r.js v2.1.14), which is usually quite weighty. As soon as we have compiled code we do not need resolving asynchronously loaded dependencies, we do not need this library. Just consider: we wrap modules into AMD, that means async. ...
Setting background-image using jQuery CSS property
...
72
You'll want to include double quotes (") before and after the imageUrl like this:
$('myOjbect'...
What is the convention for word separator in Java package names?
...e, or login names.
Examples
com.sun.eng
com.apple.quicktime.v2
edu.cmu.cs.bovik.cheese
References
java.sun.com - Code Conventions/Naming
Note that in particular, anything following the top-level domain prefix isn't specified by the above document. The JLS also agrees with...
Android: Go back to previous activity
...
phoenix
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answered Oct 27 '10 at 23:49
AbhinavAbhinav
...
Difference between “git add -A” and “git add .”
...
I don't think this is correct. Using git v2.10.windows.2 'git add' returns 'Nothing specified, nothing added'. 'git add -A' adds all changed files. Which suggests '-A' is not the default.
– Neutrino
Oct 5 '17 at 12:47
...
Swift Beta performance: sorting arrays
... 142.659763258
C: 0.162065333
Swift_sort: 114.095478272
So Swift with no optimizations was almost 1000x slower than C in this benchmark, at this stage in its development. On the other hand with both compilers set to [-Ofast] Swift actually performed at least as well if not s...
How to do something to each file in a directory with a batch script
...
72
Easiest method:
From Command Line, use:
for %f in (*.*) do echo %f
From a Batch File (doubl...
Best way to test exceptions with Assert to ensure they will be thrown
...
Now, 2017, you can do it easier with the new MSTest V2 Framework:
Assert.ThrowsException<Exception>(() => myClass.MyMethodWithError());
//async version
await Assert.ThrowsExceptionAsync<SomeException>(
() => myObject.SomeMethodAsync()
);
...
How can I do string interpolation in JavaScript?
...them simply as
> `foo
... bar`
'foo\n bar'
Note: I used io.js v2.4.0 to evaluate all the template strings shown above. You can also use the latest Chrome to test the above shown examples.
Note: ES6 Specifications are now finalized, but have yet to be implemented by all major browsers. ...