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Writing a pandas DataFrame to CSV file
...was initially confused as to how I found an answer to the question I had already written 7 years ago.
– Hayden
Jan 30 at 17:49
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How are people unit testing with Entity Framework 6, should you bother?
...n't test technologies such as EF and NHibernate. They are right, they're already very stringently tested and as a previous answer stated it's often pointless to spend vast amounts of time testing what you don't own.
However, you do own the database underneath! This is where this approach in my opin...
How to format numbers as currency string?
...time. also, i recommend modifying the beginning of the return statement to read: return s + '$' + [rest], otherwise you will not get a dollar sign.
– Jason
Jan 31 '11 at 23:58
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What are the best practices for SQLite on Android?
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Inserts, updates, deletes and reads are generally OK from multiple threads, but Brad's answer is not correct. You have to be careful with how you create your connections and use them. There are situations where your update calls will fail, even if your ...
How do I run a batch file from my Java Application?
...ld also work with just `cmd /c build.bat", in which case the output can be read from the sub-process in Java if desired.
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Are there constants in JavaScript?
... These days (3.5 years later) you can use Object.defineProperty to create read-only properties that also can't be deleted. This works in the current version of all major browsers (but incorrectly in IE8). See the answer by @NotAName
– Phrogz
Jun 1 '12 at 3:50
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Should I use s and s inside my s?
... Thanks a lot, this is what I needed! Also, robertc's comment about screen readers announcing "list of 3 items" below was very useful.
– kikito
Apr 7 '11 at 23:32
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Is MVC a Design Pattern or Architectural pattern
...ng Code Metrics).
A few benefits:
Easily Maintainable
High Re-usability
Readable because of abstractions
Architectural patterns say how to utilize resources effectively.
Parallel tasks execution like programmers and graphic designers can work parallel.
Multiple technologies can be utilized to...
What is the difference between const and readonly in C#?
What is the difference between const and readonly in C#?
31 Answers
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MySQL load NULL values from CSV data
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This will do what you want. It reads the fourth field into a local variable, and then sets the actual field value to NULL, if the local variable ends up containing an empty string:
LOAD DATA INFILE '/tmp/testdata.txt'
INTO TABLE moo
FIELDS TERMINATED BY "...