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Determine if ActiveRecord Object is New
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An ActiveRecord object lifecycle:
1.new record
item = Item.new
item.new_record? #=> true
2.persisted
item.save
item.persisted? #=> true
3.changed
item.name = "other"
item.changed? #=> true
4.destroyed
item.destroy
item.destroyed? #=> true
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Rich vs Anemic Domain Model [closed]
...ograms. 2) Applying a discount for orders that contain a specific group of items together depending on the current marketing campaign run by the store. 3) Calculating tax where amount of tax depends on each specific item of the order. In your opinion, where would all this logic belong? Could you ple...
Set selected item of spinner programmatically
... calling SetSelection() just after setAdapter() seem to display the 1st item always (Android 2.3), even the good one is selected in the dropView. adding view.post() (@Marco Hernaiz Cao answer) fix it for me.
– Christ
Jun 20 '14 at 10:14
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How do you include additional files using VS2010 web deployment packages?
...and we discuss after that.
<Target Name="CustomCollectFiles">
<ItemGroup>
<_CustomFiles Include="..\Extra Files\**\*" />
<FilesForPackagingFromProject Include="%(_CustomFiles.Identity)">
<DestinationRelativePath>Extra Files\%(RecursiveDir)%(Filename)%...
Removing multiple classes (jQuery)
...can do that!
jQuery
remove all class
$("element").removeClass();
OR
$("#item").removeAttr('class');
OR
$("#item").attr('class', '');
OR
$('#item')[0].className = '';
remove multi class
$("element").removeClass("class1 ... classn");
OR
$("element").removeClass("class1").removeClass("...").remove...
Fix code indentation in Xcode
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All the best! ????????
– tetrajen
Jul 13 at 12:41
I...
How to get a random value from dictionary in python
...ars after the original post, and now asks for a pair, rather than a single item. The final line should now be:
country, capital = random.choice(list(d.items()))
share
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improve this answer
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Removing an item from a select box
How do I remove items from, or add items to, a select box? I'm running jQuery, should that make the task easier. Below is an example select box.
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How do I get the opposite (negation) of a Boolean in Python?
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The not operator (logical negation)
Probably the best way is using the operator not:
>>> value = True
>>> not value
False
>>> value = False
>>> not value
True
So instead of your code:
if bool == True:
return False
else:
retur...
Best way to select random rows PostgreSQL
I want a random selection of rows in PostgreSQL, I tried this:
12 Answers
12
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