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How to thoroughly purge and reinstall postgresql on ubuntu? [closed]
...r Port Status Owner Data directory Log file
11 main 5432 online postgres /var/lib/postgresql/11/main /var/log/postgresql/postgresql-11-main.log
$ sudo systemctl stop postgresql@11-main
$ sudo pg_dropcluster --stop 11 main
$ sudo pg_createcluster --start 11 main
Option B
If you...
Required tags not present when using Delphi XML Data Binding Wizard
I am using the XML Data Binding Wizard in Delphi XE2 .
The schema has required tags of this type:
1 Answer
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Java JUnit: The method X is ambiguous for type Y
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205
The method assertEquals(Object, Object) is ambiguous for the type ...
What this error means i...
What is the meaning of id?
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122
id is a pointer to any type, but unlike void * it always points to an Objective-C object. For e...
ThreadStatic v.s. ThreadLocal: is generic better than attribute?
... For example, say you have this:
[ThreadStatic]
private static int Foo = 42;
The first thread that uses this will see Foo initialized to 42. But subsequent threads will not. The initializer works for the first thread only. So you end up having to write code to check if it's initialized.
ThreadLo...
The JPA hashCode() / equals() dilemma
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20 Answers
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selecting unique values from a column
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answered Dec 20 '11 at 7:10
Léon RodenburgLéon Rodenburg
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Why doesn't a python dict.update() return the object?
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222
Python's mostly implementing a pragmatically tinged flavor of command-query separation: mutato...
JavaScript checking for null vs. undefined and difference between == and ===
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answered Feb 24 '11 at 8:15
T.J. CrowderT.J. Crowder
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Return only string message from Spring MVC 3 Controller
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192
Annotate your method in controller with @ResponseBody:
@RequestMapping(value="/controller", met...