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Calling virtual functions inside constructors
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Calling virtual functions from a constructor or destructor is dangerous and should be avoided whenever possible. All C++ implementations should call the version of the function defined at the level of the hierarchy in the cur...
Glorified classes in the Java language
... lot of different answers, so I thought it would be useful to collect them all (and add some):
Classes
AutoBoxing classes - the compiler only allows for specific classes
Class - has its own literals (int.class for instance). I would also add its generic typing without creating new instances.
Stri...
How to permanently remove few commits from remote branch
...ushing it)
This SO answer illustrates the danger of such a command, especially if people depends on the remote history for their own local repos.
You need to be prepared to point out people to the RECOVERING FROM UPSTREAM REBASE section of the git rebase man page
With Git 2.23 (August 2019, nine...
How to delete from multiple tables in MySQL?
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I tried this "delete all in 1 query" with joining 6 large tables (everyone about ~15k rows) and the query took 155 seconds to delete 63 rows in 6 tables :O
– Klemen Tušar
Jul 30 '12 at 21:29
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Specifying an Index (Non-Unique Key) Using JPA
...Table;
@Entity
@Table(name = "region",
indexes = {@Index(name = "my_index_name", columnList="iso_code", unique = true),
@Index(name = "my_index_name2", columnList="name", unique = false)})
public class Region{
@Column(name = "iso_code", nullable = false)
priva...
Is it possible for git-merge to ignore line-ending differences?
...cursive --strategy-option=renormalize
This works much better than ignore-all-space.
Before Git 2.29 (Q4 2020), All "mergy" operations that internally use the merge-recursive machinery should honor the merge.renormalize configuration, but many of them didn't.
See commit 00906d6, commit 8d55225, co...
Is it faster to count down than it is to count up?
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Is it really true? and if so does anyone know why?
In ancient days, when computers were still chipped out of fused silica by hand, when 8-bit microcontrollers roamed the Earth, and when your teacher was young (or your teacher's tea...
Is it possible to get the iOS 5.1 SDK for Xcode 4.2 on Snow Leopard?
...ered Mar 8 '12 at 6:26
Mick MacCallumMick MacCallum
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Is there a better way to run a command N times in bash?
I occasionally run a bash command line like this:
19 Answers
19
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How do I execute a bash script in Terminal?
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The advice to cd anywhere at all perpetrates another common beginner misunderstanding. Unless the script internally has dependencies which require it to run in a particular directory (like, needing to read a data file which the script inexplicably doesn'...