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Is it a bad practice to catch Throwable?
...reep away this way.
Besides, Throwable covers Error as well and that's usually no point of return. You don't want to catch/handle that, you want your program to die immediately so that you can fix it properly.
share
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How to zero pad a sequence of integers in bash so that all have the same width?
...uce the following output:
00010
00011
00012
00013
00014
00015
More generally, bash has printf as a built-in so you can pad output with zeroes as follows:
$ i=99
$ printf "%05d\n" $i
00099
You can use the -v flag to store the output in another variable:
$ i=99
$ printf -v j "%05d" $i
$ echo $j...
What is the purpose of shuffling and sorting phase in the reducer in Map Reduce Programming?
...
First of all shuffling is the process of transfering data from the mappers to the reducers, so I think it is obvious that it is necessary for the reducers, since otherwise, they wouldn't be able to have any input (or input from every ...
How does Java Garbage Collection work with Circular References?
... method that prints out a unique id for the object. You'll be able to see all the objects that reference each other get collected.
– Bill the Lizard
Dec 15 '09 at 20:45
4
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Enum “Inheritance”
...
This is not possible. Enums cannot inherit from other enums. In fact all enums must actually inherit from System.Enum. C# allows syntax to change the underlying representation of the enum values which looks like inheritance, but in actuality they still inherit from System.enum.
See section 8...
Java EE web development, where do I start and what skills do I need? [closed]
...
(Updated Mar 2020)
First of all, "Java EE" has since Sep 2019 been renamed to "Jakarta EE", starting with version 8. Historically, there was also the term "J2EE" which covered versions 1.2 until 1.4. The "Java EE" covered versions 5 until 8. See also Ja...
How do I force “git pull” to overwrite local files?
... content), these files will not be affected.
First, run a fetch to update all origin/<branch> refs to latest:
git fetch --all
Then, you have two options:
git reset --hard origin/master
OR If you are on some other branch:
git reset --hard origin/<branch_name>
Explanation:
git fetch do...
Create new user in MySQL and give it full access to one database
...r'@'hostname';
Try this to give it access to the database dbTest:
GRANT ALL PRIVILEGES ON dbTest.* To 'user'@'hostname' IDENTIFIED BY 'password';
If you are running the code/site accessing MySQL on the same machine, hostname would be localhost.
Now, the break down.
GRANT - This is the command...
How do I show my global Git configuration?
I'd like to show all configured Git sections.
12 Answers
12
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INSERT IF NOT EXISTS ELSE UPDATE?
...ement case the statement would set it to NULL and then a fresh ID would be allocated.
This approach can also be used if you want to leave particular field values alone if the row in the replacement case but set the field to NULL in the insert case.
For example, assuming you want to leave Seen alon...