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Confused by python file mode “w+”
... forget this, the f.read() call will try to read from the end of the file, and will return an empty string.
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Should it be “Arrange-Assert-Act-Assert”?
... need to ensure. Such a test should always fail if the precondition fails, and this means that I don't need it embedded in all the other tests. This gives a better isolation of concerns, since one test case only verifies one thing.
There may be many preconditions that need to be satisfied for a giv...
How to get size of mysql database?
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Run this query and you'll probably get what you're looking for:
SELECT table_schema "DB Name",
ROUND(SUM(data_length + index_length) / 1024 / 1024, 1) "DB Size in MB"
FROM information_schema.tables
GROUP BY table_schema;
This ...
What is the simplest SQL Query to find the second largest value?
... produce the correct second largest value while if you used the top 2 desc and min approach, you may get the largest value instead.
– Pankaj Sharma
Apr 1 '13 at 19:22
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Add and remove multiple classes in jQuery
I'm trying to add and remove multiple classes on a text field by clicking different radio buttons. I'm not able to remove the unwanted classes while switching between different radio buttons.
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enum.values() - is an order of returned enums deterministic
...d to return them in that order.
However you should avoid relying on that, and on the ordinal() value, since it can change after inserting new items, for example.
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Constructor in an Interface?
...which implement the message interface, I can only define the
send method and not the constructor"
...these requirements are exactly what abstract classes are for.
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Is it possible to create a remote repo on GitHub from the CLI without opening browser?
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You can create a GitHub repo via the command line using the GitHub API. Check out the repository API. If you scroll down about a third of the way, you'll see a section entitled "Create" that explains how to create a repo via the API (right above that is a section th...
What does a lazy val do?
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In contrast to a method (defined with def) a lazy val is executed once and then never again. This can be useful when an operation takes long time to complete and when it is not sure if it is later used.
scala> class X { val x = { Thread.sleep(2000); 15 } }
defined class X
scala> class Y ...
PHP script to loop through all of the files in a directory?
...of files, such as the script itself or other "system" files. (Like the . and .. "directories".)
8 Answers
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