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Best practices to handle routes for STI subclasses in rails
...roller: 'person', type: 'Employee'
http://samurails.com/tutorial/single-table-inheritance-with-rails-4-part-2/
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What are the pros and cons of performing calculations in sql vs. in your application
shopkeeper table has following fields:
13 Answers
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What's with 181783497276652981 and 8682522807148012 in Random (Java 7)?
...o Java?
Yes, seems to be a typo.
Does 181783497276652981 have an acceptable merit?
This could be determined using the evaluation algorithm presented in the paper. But the merit of the "original" number is probably higher.
And why was 8682522807148012 chosen?
Seems to be random. It could ...
Calling JMX MBean method from a shell script
...</h4>
<p>Operation exposed for management</p>
<table cellspacing="2" cellpadding="2" border="1">
<tr class="OperationHeader">
<th>Param</th>
<th>ParamType</th>
<th>ParamValue</th>
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Why should you use an ORM? [closed]
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Making data access more abstract and portable. ORM implementation classes know how to write vendor-specific SQL, so you don't have to.
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I need to store postal codes in a database. How big should the column be?
...re than once, and might be related to street names or town names. Separate table(s).
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Calculate difference between two datetimes in MySQL
..... etc. I want similar kind of functionality. For example there is one table say REQUESTS (id, message, timestamp). timestamp while storing will be NOW() . while i run a query, select * from requests, instead of displaying that value it should display id, message and how much time back request ...
What is the difference between Strategy design pattern and State design pattern?
...that useful. You can always implement finite state machines using a lookup table (it's not an OO way, but it works pretty well).
Strategy is used for the following [GoF book p. 316]:
many related classes differ only in their behavior. Strategies provide a way to configure a class with one of...
Javascript dynamically invoke object method from string
...orking for me using a variable inside a function:const genericResolver = ( table, action , values ) => { return Auth.isAuthenticated() .then(() => { return eval(table).findAll()
– stackdave
Oct 28 '17 at 14:57
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belongs_to through associations
...ter off caching the question_id on Choice and adding a unique index to the table (especially because validates_uniqueness_of is prone to race conditions).
If you're paranoid, add a custom validation to Choice that confirms that the answer's question_id matches, but it sounds like the end user shoul...