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How to think in data stores instead of databases?
...e Datastore instead of databases? It seems I've trained my mind to think 100% in object relationships that map directly to table structures, and now it's hard to see anything differently. I can understand some of the benefits of Google Datastore (e.g. performance and the ability to distribute data...
What is a StackOverflowError?
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edited Jun 16 '19 at 20:25
Tom
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answered Oct ...
How do I catch an Ajax query post error?
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310
Since jQuery 1.5 you can use the deferred objects mechanism:
$.post('some.php', {name: 'John'})...
SQL command to display history of queries
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edited Jun 10 '14 at 6:36
Baby Groot
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Rails: select unique values from a column
...rails 5+
Model.distinct.pluck(:rating)
Update
Apparently, as of rails 5.0.0.1, it works only on "top level" queries, like above. Doesn't work on collection proxies ("has_many" relations, for example).
Address.distinct.pluck(:city) # => ['Moscow']
user.addresses.distinct.pluck(:city) # => [...
Test if object implements interface
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580
if (object is IBlah)
or
IBlah myTest = originalObject as IBlah
if (myTest != null)
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Search for string and get count in vi editor
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answered Apr 3 '09 at 20:43
Kevin BeckKevin Beck
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How do I add a bullet symbol in TextView?
...You could try with •
Update
Just to clarify: use setText("\u2022 Bullet"); to add the bullet programmatically. 0x2022 = 8226
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How to detect input type=file “change” for the same file?
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answered Nov 7 '10 at 15:14
BrunoLMBrunoLM
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