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Spring Boot JPA - configuring auto reconnect
... the following to your application.properties up to 1.3
spring.datasource.testOnBorrow=true
spring.datasource.validationQuery=SELECT 1
As djxak noted in the comment, 1.4+ defines specific namespaces for the four connections pools Spring Boot supports: tomcat, hikari, dbcp, dbcp2 (dbcp is deprecat...
An efficient way to transpose a file in Bash
...2
2 3 4 5
3 6 7 8
4 9 10 11
1 0 1 2
$ wc -l < file
10000
$ time perl test.pl file >/dev/null
real 0m0.480s
user 0m0.442s
sys 0m0.026s
$ time awk -f test.awk file >/dev/null
real 0m0.382s
user 0m0.367s
sys 0m0.011s
$ time perl test.pl file >/dev/null
real 0m...
Hibernate - Batch update returned unexpected row count from update: 0 actual row count: 0 expected:
... give you a better idea as to which line causes the problem.
Create a unit test which replicates the problem without configuring a transaction manager in Spring. This should give you a better idea of the offending line of code.
Hope that helps.
...
Use PHP to create, edit and delete crontab jobs?
... manages the cron files so you can use them, for example per project. Unit Tests available :-)
Sample from command line:
bin/cronman --enable /var/www/myproject/.cronfile --user www-data
Sample from API:
use php\manager\crontab\CrontabManager;
$crontab = new CrontabManager();
$crontab->enab...
C++ performance challenge: integer to std::string conversion
...he second algorithm is my actual submission for highest performance. In my tests it beats all the others on both gcc and msvc.
I think I know why some of the results on MSVC are very good. std::string has two relevant constructors
std::string(char* str, size_t n)
and
std::string(ForwardIterator b...
How do I check if a list is empty?
...k typing wins out (in effect, saying that __nonzero__ is the interface for testing emptiness docs.python.org/reference/datamodel.html#object.__nonzero__)
– andrew cooke
May 31 '12 at 14:50
...
Using Mockito with multiple calls to the same method with the same arguments
...return different objects on subsequent invocations? I'd like to do this to test nondeterminate responses from an ExecutorCompletionService . i.e. to test that irrespective of the return order of the methods, the outcome remains constant.
...
Temporarily disable auto_now / auto_now_add
...
I've recently faced this situation while testing my application. I needed to "force" an expired timestamp. In my case I did the trick by using a queryset update. Like this:
# my model
class FooBar(models.Model):
title = models.CharField(max_length=255)
upda...
Array vs. Object efficiency in JavaScript
...faster than objects. But there is no 100% correct solution.
Update 2017 - Test and Results
var a1 = [{id: 29938, name: 'name1'}, {id: 32994, name: 'name1'}];
var a2 = [];
a2[29938] = {id: 29938, name: 'name1'};
a2[32994] = {id: 32994, name: 'name1'};
var o = {};
o['29938'] = {id: 29938, name: 'n...
What does `someObject.new` do in Java?
...
Have a look at this example:
public class Test {
class TestInner{
}
public TestInner method(){
return new TestInner();
}
public static void main(String[] args) throws Exception{
Test t = new Test();
Test.TestInner ti = ...