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How does TransactionScope roll back transactions?
...gration test where I will be inserting a number of objects into a database and then checking to make sure whether my method retrieves those objects.
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View contents of database file in Android Studio
I have been using Android Studio to develop my app since it's was released.
28 Answers
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Why does JPA have a @Transient annotation?
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Not sure I'm understanding you, but have a look at "Pascal Thivent"'s answer ;)
– Jawher
Jan 28 '10 at 15:46
31
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How to iterate over a JSONObject?
...der doesn't matter in maps of properties: keys in JSONObject are unordered and your assertion was a simple reflection of a private implementation ;)
– caligari
Oct 1 '13 at 13:55
6...
Check if table exists in SQL Server
...always best to use an INFORMATION_SCHEMA view. These views are (mostly) standard across many different databases and rarely change from version to version.
To check if a table exists use:
IF (EXISTS (SELECT *
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_SCHEMA = ...
What are markers in Java Logging frameworks and what is a reason to use them?
...d triggering in the logback documentation. You may also combine log levels and markers for triggering.
Filtering: Markers are very useful for making certain valuable log statements stand out. For example, you can color/mark all your persistence related logs (in various and multiple class files) wi...
How do I use the lines of a file as arguments of a command?
...ers), a shortcut for $(cat afile) is $(< afile), so you'd write:
mycommand "$(< file.txt)"
Documented in the bash man page in the 'Command Substitution' section.
Alterately, have your command read from stdin, so: mycommand < file.txt
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What is InputStream & Output Stream? Why and when do we use them?
Someone explain to me what InputStream and OutputStream are?
8 Answers
8
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Plotting time in Python with Matplotlib
I have an array of timestamps in the format (HH:MM:SS.mmmmmm) and another array of floating point numbers, each corresponding to a value in the timestamp array.
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Can I implement an autonomous `self` member type in C++?
...itance with as many base classes as you want (thanks to variadic templates and variadic macros):
class WITH_SELF(Foo2)
{
/* ... */
};
class WITH_SELF_DERIVED(Bar2,Foo,Foo2)
{
/* ... */
};
I have verified this to work on gcc 4.8 and clang 3.4.
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