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Should I initialize variable within constructor or outside constructor [duplicate]
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@Cromm yes, you can do that, but my point is that it is not a good practice, in my opinion: - if you have a logic, that is not related to actual construction, - if your logic can cause an exception, then you are opening a door to a potential usage of incomplete ...
How to annotate MYSQL autoincrement field with JPA annotations
Straight to the point, problem is saving the object Operator into MySQL DB.
Prior to save, I try to select from this table and it works, so is connection to db.
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mysql command for showing current configuration variables
...do more with the results, as it is a plain old query.
For example you can convert units to become more readable. The following query provides the current global setting for the innodb_log_buffer_size in bytes and megabytes:
SELECT
variable_name,
variable_value AS innodb_log_buffer_size_bytes,
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C++ code file extension? .cc vs .cpp [closed]
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@CharlesAddis - Yes, I had to convert lots of code that had "abcd.H" (the c++ interface) and "abcd.h" (the C interface) in the same directory to "abcd.hpp" and "abcd.h" because just doing an "svn co" or unzip onto a Windows box or Mac OS X box (with defau...
What is the difference between lemmatization vs stemming?
...o incorrect meanings and spelling. Lemmatization considers the context and converts the word to its meaningful base form, which is called Lemma. Sometimes, the same word can have multiple different Lemmas. We should identify the Part of Speech (POS) tag for the word in that specific context. Here a...
Improve INSERT-per-second performance of SQLite
...o faster. For instance, if you have key value pairs, try making the key an INTEGER PRIMARY KEY if possible, which will replace the implied unique row number column in the table.
If you are using multiple threads, you can try using the shared page cache, which will allow loaded pages to be shared bet...
How to enable/disable bluetooth programmatically in android
...ission it's work but if not you need to use startActivityForResult(enableBtIntent, 0); to enable your bluetooth
– Majid Golshadi
Jan 11 '14 at 14:17
1
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C fopen vs open
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open() is a low-level os call. fdopen() converts an os-level file descriptor to the higher-level FILE-abstraction of the C language. fopen() calls open() in the background and gives you a FILE-pointer directly.
There are several advantages to using FILE-objects r...
Regular expression to allow spaces between words
... @Pierre - It's fairly difficult to take human instructions and convert them to explicit rules. (The human language is fluid and full of ambiguities, and our brains do most of the work required to resolve things and fill in the gaps. Computers don't have such a brain, and clever attempts ...
Visual Studio debugging “quick watch” tool and lambda expressions
...ambda expressions in the watch / locals / immediate window. As Marc has pointed out this is incredibly complex. I wanted to dive a bit further into the topic though.
What most people don't consider with executing an anonymous function in the debugger is that it does not occur in a vaccuum. The...