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mongodb, replicates and error: { “$err” : “not master and slaveOk=false”, “code” : 13435 }
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You have to set "slave okay" mode to let the mongo shell know that you're allowing reads from a secondary. This is to protect you and your applications from performing eventually consistent reads by accident. You can do this in the shell with:
rs.slaveOk()
After that you can query normally from ...
PHP - Check if two arrays are equal
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The above comment is false. If $b has all the elements $a has plus some extra ones, the two arrays are not equal yet the above code will say they are.
– Ghola
Sep 8 '14 at 12:14
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fatal: 'origin' does not appear to be a git repository
... set-url origin ssh://git@github.com/username/newRepoName.git
After this all commands started working fine. You can check the change by using
git remote -v
In my case after successfull change it showed correct renamed repo in URL
[aniket@alok Android]$ git remote -v
origin ssh://git@github.c...
How do I convert a Django QuerySet into list of dicts?
...;> Blog.objects.values()
[{'id': 1, 'name': 'Beatles Blog', 'tagline': 'All the latest Beatles news.'}],
>>> Blog.objects.values('id', 'name')
[{'id': 1, 'name': 'Beatles Blog'}]
Note: the result is a QuerySet which mostly behaves like a list, but isn't actually an instance of list. Us...
What are copy elision and return value optimization?
... is an optimization implemented by most compilers to prevent extra (potentially expensive) copies in certain situations. It makes returning by value or pass-by-value feasible in practice (restrictions apply).
It's the only form of optimization that elides (ha!) the as-if rule - copy elision can be a...
How to make node.js require absolute? (instead of relative)
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There's a really interesting section in the Browserify Handbook:
avoiding ../../../../../../..
Not everything in an application properly belongs on the public npm
and the overhead of setting up a private npm or git repo is sti...
What does “xmlns” in XML mean?
...t it "means" when an XML parser reads the document.
NOTE: You cannot actually use the full namespace URI in place of the namespace prefix in an XML instance document.
Check out this tutorial on namespaces: http://www.sitepoint.com/xml-namespaces-explained/
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Finding diff between current and last version
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I don't really understand the meaning of "last version".
As the previous commit can be accessed with HEAD^, I think that you are looking for something like:
git diff HEAD^ HEAD
As of Git 1.8.5, @ is an alias for HEAD, so you can us...
Chrome: timeouts/interval suspended in background tabs?
...ted) setTimeout is not very accurate but for most appliances not dramatically inaccurate. Now if I run the test in in Chrome and let it run in a background tab (so, switching to another tab and browse on there), returning to the test and inspecting te results (if the test finished) they are dramat...
Auto-expanding layout with Qt-Designer
... QVBoxLayout should now stretch to fit the window and will resize automatically when the entire window is resized.
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