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Blocks and yields in Ruby
...thursday"]
Or, we can also provide a custom sort algorithm, for instance based on the string size:
days.sort do |x,y|
x.size <=> y.size
end
=> ["monday", "friday", "tuesday", "thursday", "wednesday"]
I hope this helps you to understand it better.
BTW, if the block is optional y...
What is the difference between persist() and merge() in JPA and Hibernate?
... entity, it
becomes managed. The entity X will be
entered into the database at or before
transaction commit or as a result of
the flush operation.
If X is a
preexisting managed entity, it is
ignored by the persist operation.
However, the persist operation is
cascaded to entities re...
Have a fixed position div that needs to scroll if content overflows
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In Intellij, how do I toggle between camel case and underscore spaced?
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What is the difference between '>' and a space in CSS selectors?
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Django-DB-Migrations: cannot ALTER TABLE because it has pending trigger events
...ee: django.readthedocs.io/en/latest/ref/migration-operations.html On databases that do support DDL transactions (SQLite and PostgreSQL), RunPython operations do not have any transactions automatically added besides the transactions created for each migration. Thus, on PostgreSQL, for example, you ...
Anonymous recursive PHP functions
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What does it mean for a data structure to be “intrusive”?
...ects. For instance, if you retrieve a list of all the employees in the database, then change the name of one of them, and want to save it back to the database, the intrusive list of employees would be told when the employee object changed because that object knows which list it is in.
A non-intrusi...
.bashrc/.profile is not loaded on new tmux session (or window) — why?
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Can an enum class be converted to the underlying type?
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