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Difference between “read commited” and “repeatable read”
...ame data again, it will find the previously read data in place, unchanged, and available to read.
The next isolation level, serializable, makes an even stronger guarantee: in addition to everything repeatable read guarantees, it also guarantees that no new data can be seen by a subsequent read.
Sa...
How do I use a Boolean in Python?
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Actually Python didn't have a boolean type for a long time (as in old C), and some programmers still use integers instead of booleans.
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Why do we need virtual functions in C++?
I'm learning C++ and I'm just getting into virtual functions.
26 Answers
26
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Qt 5.1.1: Application failed to start because platform plugin “windows” is missing
...er people by directly providing the solution. This should not be forgotten and so far my answer helped a lot of people. Therefore my question is definitely not a duplicate. By the way: The accepted answer within the provided link on top does not solve the problem !
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What is this operator in MySQL?
I'm working on code written by a previous developer and in a query it says,
9 Answers
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Calculate the median of a billion numbers
If you have one billion numbers and one hundred computers, what is the best way to locate the median of these numbers?
25 A...
Laravel - Route::resource vs Route::controller
I read the docs on the Laravel website, Stack Overflow, and Google but still don't understand the difference between Route::resource and Route::controller .
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mysql error 1364 Field doesn't have a default values
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Set a default value for Created_By (eg: empty VARCHAR) and the trigger will update the value anyways.
create table try (
name varchar(8),
CREATED_BY varchar(40) DEFAULT '' not null
);
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Generating a unique machine id
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Parse the SMBIOS yourself and hash it to an arbitrary length. See the PDF specification for all SMBIOS structures available.
To query the SMBIOS info from Windows you could use EnumSystemFirmwareEntries, EnumSystemFirmwareTables and GetSystemFirmware...
Suppressing “is never used” and “is never assigned to” warnings in C#
...g restore 0169
To suppress warnings for "Field XYZ is never assigned to, and will always have its default value XX", you do this:
#pragma warning disable 0649
... field declaration
#pragma warning restore 0649
To find such warning numbers yourself (ie. how did I know to use 0169 and 0649), you ...