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What are copy elision and return value optimization?
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Introduction
For a technical overview - skip to this answer.
For common cases where copy elision occurs - skip to this answer.
Copy elision is an optimization implemented by most compilers to prevent extra (potentially expensive) copies in certain situations. It makes returning by value or...
Tab key == 4 spaces and auto-indent after curly braces in Vim
...ng
To see your current settings:
:set all
As graywh points out in the comments, smartindent has been replaced by cindent which "Works more cleverly", although still mainly for languages with C-like syntax:
:help C-indenting
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JAX-RS / Jersey how to customize error handling?
...urse, this is just a simple example. You can make the Exception much more complex if necessary, and you can generate what ever http response code you need to.
One other approach is to wrap an existing Exception, perhaps an ObjectNotFoundException with an small wrapper class that implements the E...
SQLiteDatabase.query method
...specific columns as in SELECT column1, column2 FROM ... - you can also put complex expressions here:
new String[] { "(SELECT max(column1) FROM table1) AS max" } would give you a column named max holding the max value of column1
whereClause
the part you put after WHERE without that keyword, e.g. ...
How does MySQL process ORDER BY and LIMIT in a query?
... @Green, you're mistaken. Read this for the explanation: dev.mysql.com/doc/refman/5.7/en/limit-optimization.html When the ORDER BY column is indexed, it may return records in a different order than without the LIMIT, when there are more than 1 records with the same value in that column.
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How to select from subquery using Laravel Query Builder?
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In addition to @delmadord's answer and your comments:
Currently there is no method to create subquery in FROM clause, so you need to manually use raw statement, then, if necessary, you will merge all the bindings:
$sub = Abc::where(..)->groupBy(..); // Eloquent Bu...
Formatting a number with exactly two decimals in JavaScript
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edited Jun 20 at 9:12
Community♦
111 silver badge
answered Nov 13 '09 at 2:02
Christian C. Salvad...
How to use UTF-8 in resource properties with ResourceBundle
...can be used as follows:
ResourceBundle bundle = ResourceBundle.getBundle("com.example.i18n.text", new UTF8Control());
See also:
Unicode - How to get the characters right?
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Correct approach to global logging in Golang
...arate logger. It's probably a good idea to create a logger for each bigger component of your project. For example, if your project uses a SMTP service for sending mails, creating a separate logger for the mail service sounds like a good idea so that you can filter and turn off the output separately....
What's the reason I can't create generic array types in Java?
...Java's arrays (unlike generics) contain, at runtime, information about its component type. So you must know the component type when you create the array. Since you don't know what T is at runtime, you can't create the array.
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