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find vs find_by vs where
...e, you'd use the following syntax:
Model.find_by(name: "Bob")
.where is more of a catch all that lets you use a bit more complex logic for when the conventional helpers won't do, and it returns an array of items that match your conditions (or an empty array otherwise).
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How to generate sample XML documents from their DTD or XSD?
...me answer my question: stackoverflow.com/questions/7041388/…, I would be more than happy to mark yours as the answer.
– Eric H
Aug 12 '11 at 14:50
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Which ORM should I use for Node.js and MySQL? [closed]
... It's another great option for people looking for mysql ORM. The syntax is more complex, but nice too.
– dresende
Dec 9 '12 at 21:47
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Finding all possible permutations of a given string in python
... out that this is not what we'd traditionally think of as a type cast, but more of a call to the set() constructor.
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Difference between `set`, `setq`, and `setf` in Common Lisp?
...an set only the symbol-value of its argument. setq is not "set quoted" any more. The fact that setq is a special form, not a macro shows that.
– KIM Taegyoon
Jul 3 '18 at 14:36
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How to get the instance id from within an ec2 instance?
...instance-id || die \"wget instance-id has failed: $?\"`"
An example of a more advanced use (retrieve instance ID as well as availability zone and region, etc.):
EC2_INSTANCE_ID="`wget -q -O - http://169.254.169.254/latest/meta-data/instance-id || die \"wget instance-id has failed: $?\"`"
test -n ...
How do I read a text file of about 2 GB? [duplicate]
I have a .txt file whose memory is more than 2 GB. The problem is I cannot open it with Notepad, Notepad++ or any other editor programs.
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Using MemoryStore in production
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Ok, after talking to Connect developers, I got more information. There are two things considered memory leaks here:
problem with JSON parsing which is already fixed in recent versions
the fact that there is no cleanup of expired sessions if the users never access them (...
PHP: If internet explorer 6, 7, 8 , or 9
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I changed it to [4-8]. IE updates are getting more and more frequent and I really want to make sure I don't have to make a similar change during the lifetime of the web app I'm working on (as it only has a lifespan of 3 years). If someone is browsing the web with IE 5 or...
What are the advantages of NumPy over regular Python lists?
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NumPy's arrays are more compact than Python lists -- a list of lists as you describe, in Python, would take at least 20 MB or so, while a NumPy 3D array with single-precision floats in the cells would fit in 4 MB. Access in reading and writing ...