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What is the difference between map and flatMap and a good use case for each?
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Use test.md as a example:
➜ spark-1.6.1 cat test.md
This is the first line;
This is the second line;
This is the last line.
scala> val textFile = sc.textFile("test.md")
scala> textFile.map(line => line.split(" ")).c...
How to design a product table for many kinds of product where each product has many parameters
...e. What should I do now?
Add the field to the main_product_table. Write a script to loop through the electronics and put the correct value from each type_table to the main_product_table. Then drop that column from each type_table.
Now If I was always using the same GetProductData class to interact...
Has anyone used Coffeescript for a production application? [closed]
...including support for offline mode.
All of our coffeescript code is fully tested. The tests themselves are written in coffeescript, and use the Qunit framework (which is written in javascript). We also wrote an extension to the Qunit framework that makes the tests nicer. The Qunit extension is w...
Call int() function on every list element?
...a Python built-in function implemented in C, it has a lower per item cost. Testing on an input of only four values will not provide useful information on scaling. That said, in my own tests (on Py2.7.12 and Py3.5.2, the latter with list() wrapping), Py2 with map won even for four element inputs, and...
Could not load file or assembly … An attempt was made to load a program with an incorrect format (Sy
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I had this problem running unit tests (xunit) in Visual Studio 2015 and came across the following fix:
Menu Bar -> Test -> Test Settings -> Default Processor Architecture -> X64
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How to use GNU Make on Windows?
...ain if needed
# Update again
pacman -Su
# Install make
pacman -S make
# Test it (show version)
make -v
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“is” operator behaves unexpectedly with integers
...tively. For example:
>>> a = 1000
>>> a == 1000 # Test integers like this,
True
>>> a != 5000 # or this!
True
>>> a is 1000 # Don't do this! - Don't use `is` to test integers!!
False
Explanation
To know this, you need to know the following.
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Trust Anchor not found for Android SSL Connection
...tevie Accepting EVERY certificate is only an option for a proof of concept test, where SSL connection is not the part you want to test. Otherwise you don't have to use SSL, if you accept every certificate, as the connection is not secure!
– Matthias B
Apr 30 '1...
How can I give the Intellij compiler more heap space?
... my case the error was caused by the insufficient memory allocated to the "test" lifecycle of maven. It was fixed by adding <argLine>-Xms3512m -Xmx3512m</argLine> to:
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupI...
Where is the documentation for the values() method of Enum?
...s()) {
System.out.println(m);
}
you will see
public static test.Sex test.Sex.valueOf(java.lang.String)
public static test.Sex[] test.Sex.values()
These are all public methods that "sex" class has. They are not in the source code, javac.exe added them
Notes:
never use sex as a c...