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Rails: create on has_one association
...work. However there is a big difference between has_many relations and has_one relations:
With a has_many relation, shops returns an ActiveRecord collection object, which has methods that you can use to add and remove shops to/from a user. One of those methods is create, which creates a new shop an...
JMS Topic vs Queues
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That means a topic is appropriate. A queue means a message goes to one and only one possible subscriber. A topic goes to each and every subscriber.
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SQL how to increase or decrease one for a int column in one command
...n. During check in or check out, we need to update that Quantity column by one. Is there a way to do this in one action or we have to get the existing value and then add or minus one on top of it?
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How do I convert array of Objects into one Object in JavaScript?
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Check out FirstOne's answer for a modern approach.
– Tibos
Feb 10 '19 at 13:14
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One-liner to check whether an iterator yields at least one element?
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Similarly if you need to check if the iterator is empty, one could use all(False for _ in iterator) will check if the iterator is empty. (all returns True if the iterator is empty, otherwise it stops when it sees the first False element)
– KGardevoir
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What is the best way to solve an Objective-C namespace collision?
Objective-C has no namespaces; it's much like C, everything is within one global namespace. Common practice is to prefix classes with initials, e.g. if you are working at IBM, you could prefix them with "IBM"; if you work for Microsoft, you could use "MS"; and so on. Sometimes the initials refer to ...
Can you delete multiple branches in one command with Git?
...ith things like * and -> (for symrefs) which can mess you up in scripts/one-liners.
– Cascabel
Sep 8 '10 at 23:05
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Why don't they teach these things in school? [closed]
... I'm really wondering why they don't teach a few of the things I learned sooner in school though. To name a few:
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How can I use inverse or negative wildcards when pattern matching in a unix/linux shell?
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pattern matching operators are recognized.A pattern-list is a list of one or more patterns separated by a |. Composite patterns may be formed using one or more of the following sub-patterns:
?(pattern-list)
Matches zero or one occurrence of the given patterns
*(pattern-list)
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Spring Data: “delete by” is supported?
...Atapin Downvote because it is no longer a good answer. Maybe delete it ? One of stackoverflows flaws is handling version changes / bugfixes associated with libraries in question.
– Ben George
Jan 15 '15 at 15:35
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