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How to upgrade PostgreSQL from version 9.6 to version 10.1 without losing data?
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Assuming you've used home-brew to install and upgrade Postgres, you can perform the following steps.
Stop current Postgres server:
launchctl unload ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist
Initialize a new 10.1 database:
initdb /usr/local/var/postgre...
What is the need of JSF, when UI can be achieved with JavaScript libraries such as jQuery and Angula
I was reading about JSF that its a UI framework and provides some UI components. But how is it better or different from number of components that are available from jQueryUI, AngularJS, ExtJS, or even plain HTML, CSS and JavaScript.
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Map.clear() vs new Map : Which one will be better? [duplicate]
...h is backed with new array. So, garbage collector should clear all the key and values from the previous map, and clear the reference to itself. So O(n) algorithm is executed anyway, but in the garbage collector thread. For 1000 records you won't see any difference.
BUT. The performance guide tells ...
What is the purpose of global.asax in asp.net
How can we use global.asax in asp.net? And what is that?
6 Answers
6
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When does Java's Thread.sleep throw InterruptedException?
...o do not want to do nothing. When a
blocking method detects interruption and throws InterruptedException,
it clears the interrupted status. If you catch InterruptedException
but cannot rethrow it, you should preserve evidence that the
interruption occurred so that code higher up on the call ...
How to call erase with a reverse iterator
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After some more research and testing I found the solution. Apparently according to the standard [24.4.1/1] the relationship between i.base() and i is:
&*(reverse_iterator(i)) == &*(i - 1)
(from a Dr. Dobbs article):
So you need to apply...
Using Razor within JavaScript
...ut JavaScript code. JavaScript code should be placed in a static .js file, and then it should get the data that it needs either from an Ajax call or by scanning data- attributes from the HTML. Besides making it possible to cache your JavaScript code, this also avoids issues with encoding, since Razo...
Convert RGBA PNG to RGB with PIL
...com/mC4Wgqzv Thanks! Two things about your post though: The png.load() command seems to be unnecessary, and line 4 should be background = Image.new("RGB", png.size, (255, 255, 255)).
– Danilo Bargen
Feb 27 '12 at 14:39
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Detect if a NumPy array contains at least one non-numeric value?
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This should be faster than iterating and will work regardless of shape.
numpy.isnan(myarray).any()
Edit: 30x faster:
import timeit
s = 'import numpy;a = numpy.arange(10000.).reshape((100,100));a[10,10]=numpy.nan'
ms = [
'numpy.isnan(a).any()',
'any(n...
How do I contribute to other's code in GitHub? [closed]
... project in GitHub . Should I fork it? Branch it? What is recommended and how to do it?
7 Answers
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