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How do I automatically sort a has_many relationship in Rails?
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You can specify the sort order for the bare collection with an option on has_many itself:
class Article < ActiveRecord::Base
has_many :comments, :order => 'created_at DESC'
end
class Comment < ActiveRecord::Base
belongs_...
How can you program if you're blind?
...tions where punctuation matters and gets complicated. Examples of this are if statements with lots of nested parenthesis’s and JCL where punctuation is incredibly important.
Update
I'm playing with Emacspeak under cygwin http://emacspeak.sourceforge.net I'm not sure if this will be usable as a p...
What is the difference between #include and #include “filename”?
In the C and C++ programming languages, what is the difference between using angle brackets and using quotes in an include statement, as follows?
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Do you need break in switch when return is used?
I was wondering if I need to use "break" in "switch" function when "return" is used.
7 Answers
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How to clear a notification in Android
Is it possible to clear a notification programatically?
14 Answers
14
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String.IsNullOrWhiteSpace in LINQ Expression
...e latter doesn't (at least as far as Oracle's EF driver is concerned). Aka if you use: b.Diameter.Trim() == "" <-- this won't work as intended (crazy I know ...)
– XDS
Dec 14 '18 at 13:59
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Java associative-array
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This will throw NullPointerException if outer map does not contain map for entry 0. Isn't PHP more permissive with $arr[0]['name'] (I don't know this language at all)?
– Tomasz Nurkiewicz
Feb 25 '11 at 21:49
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PostgreSQL query to list all table names?
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If you want list of database
SELECT datname FROM pg_database WHERE datistemplate = false;
If you want list of tables from current pg installation of all databases
SELECT table_schema,table_name FROM information_schema.tab...
How do I create a round cornered UILabel on the iPhone?
Is there a built in way to create round-cornered UILabels? If the answer is no, how would one go about creating such an object?
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Double vs. BigDecimal?
...) could result in the 0.001 being dropped alltogether when summing as the difference in magnitude is so large. With BigDecimal this would not happen.
The disadvantage of BigDecimal is that it's slower, and it's a bit more difficult to program algorithms that way (due to + - * and / not being overlo...