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Database cluster and load balancing
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132
Database clustering is a bit of an ambiguous term, some vendors consider a cluster having two ...
Rails: Default sort order for a rails model?
...y evaluation), so 7 scopes could be chained together but only resulting in 1 actual database query, to avoid performance problems from executing 7 separate queries.
You can use a passed in parameter such as a date or a user_id (something that will change at run-time and so will need that 'lazy eval...
How to switch a user per task or set of tasks?
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With Ansible 1.9 or later
Ansible uses the become, become_user, and become_method directives to achieve privilege escalation. You can apply them to an entire play or playbook, set them in an included playbook, or set them for a particula...
jQuery / Javascript - How do I convert a pixel value (20px) to a number value (20)
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185
No jQuery required for this, Plain Ol' JS (tm) will do ya,
parseInt(a, 10);
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What does “mro()” do?
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214
Follow along...:
>>> class A(object): pass
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>>> A.__mro__
(<class '__...
Adding additional data to select options using jQuery
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HTML Markup
<select id="select">
<option value="1" data-foo="dogs">this</option>
<option value="2" data-foo="cats">that</option>
<option value="3" data-foo="gerbils">other</option>
</select>
Code
// JavaScript using jQuery
$(fu...
How do you sort a list in Jinja2?
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168
As of version 2.6, Jinja2's built-in sort filter allows you to specify an attribute to sort by...
cancelling a handler.postdelayed process
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481
I do this to post a delayed runnable:
myHandler.postDelayed(myRunnable, SPLASH_DISPLAY_LENGTH);...
Determine which MySQL configuration file is being used
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15 Answers
15
Active
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MongoDB, remove object from array
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142
try..
db.mycollection.update(
{'_id': ObjectId("5150a1199fac0e6910000002")},
{ $pull...