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Rails: fields_for with index?
...uestion do |fq| %>
# here you have both the 'question' object and the current 'index'
<% end %>
<% end %>
From:
http://railsapi.com/doc/rails-v3.0.4/classes/ActionView/Helpers/FormHelper.html#M006456
It’s also possible to specify the
instance to be used:
<%= fo...
How to decorate a class?
...class? Specifically, I want to use a decorator to add a member to a class and change the constructor to take a value for that member.
...
Passing a method as a parameter in Ruby
...ult argument in a block declaration like that. So you need to use a splat and setup the default in the proc code itself.
Or, depending on your scope of all this, it may be easier to pass in a method name instead.
def weightedknn(data, vec1, k = 5, weightf = :gaussian)
...
weight = self.send...
What's the difference between xsd:include and xsd:import?
What's the difference between xsd:include and xsd:import ? When would you use one instead of the other, and when might it not matter?
...
Subtract 7 days from current date
...ate: 2012-04-22 12:53:45 +0000
seven days ago: 2012-04-15 12:53:45 +0000
And I'm fully agree with JeremyP.
BR.
Eugene
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How do you serialize a model instance in Django?
...
You can easily use a list to wrap the required object and that's all what django serializers need to correctly serialize it, eg.:
from django.core import serializers
# assuming obj is a model instance
serialized_obj = serializers.serialize('json', [ obj, ])
...
How to remove trailing whitespaces with sed?
...
You can use the in place option -i of sed for Linux and Unix:
sed -i 's/[ \t]*$//' "$1"
Be aware the expression will delete trailing t's on OSX (you can use gsed to avoid this problem). It may delete them on BSD too.
If you don't have gsed, here is the correct (but hard-to...
How to get value of selected radio button?
...d answer you can check which of the radio buttons in the group is selected and get only the value of the selected (checked) one.
– Broco
Sep 4 '14 at 18:21
4
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Change default text in input type=“file”?
...
Each browser has it's own rendition of the control and as such you can't change either the text or the orientation of the control.
There are some "kind of" hacks you may want to try if you want an html/css solution rather than a Flash or silverlightsolution.
http://www.quir...
Length of a JavaScript object
... methods to Object is usually safe, though.
Here's an update as of 2016 and widespread deployment of ES5 and beyond. For IE9+ and all other modern ES5+ capable browsers, you can use Object.keys() so the above code just becomes:
var size = Object.keys(myObj).length;
This doesn't have to modify...