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How to run a single test from a rails test suite?
...oject's main directory:
ruby -I test test/unit/my_model_test.rb -n test_nam>me m>
This runs a single test nam>me m>d "nam>me m>", defined in the MyModelTest class in the specified file. The test_nam>me m> is form>me m>d by taking the test nam>me m>, prepending it with the word "test", then separating the words with underscor...
How to fix java.lang.UnsupportedClassVersionError: Unsupported major.minor version
...n the Java code with a newer version of Java JRE or specify the target param>me m>ter to the Java compiler to instruct the compiler to create code compatible with earlier Java versions.
For example, in order to generate class files compatible with Java 1.4, use the following command line:
javac -targe...
Network tools that simulate slow network connection [closed]
I would like to visually evaluate web pages response tim>me m> for several Internet connections types (DSL, Cable, T1, dial-up etc.) while my browser and web server are on the sam>me m> LAN or even on the sam>me m> machine. Are there any simple network tools or browser plug-ins that slow down network bandwidth to ...
Get integer value from string in swift
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As of Swift 2.0 you no longer have the toInt() m>me m>thod as part of String. So this Int constructor is now the only way to convert strings to ints.
– Morgan Wilde
Jul 20 '15 at 22:41
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When to use references vs. pointers
...r to an object is a valid option when the function can return nullptr in som>me m> cases and it is assum>me m>d it will. That said, a better option would be to use som>me m>thing similar to std::optional (requires C++17; before that, there's boost::optional).
Another example is to use pointers to raw m>me m>mory for sp...
Constructing pandas DataFram>me m> from values in variables gives “ValueError: If using all scalar values
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The error m>me m>ssage says that if you're passing scalar values, you have to pass an index. So you can either not use scalar values for the columns -- e.g. use a list:
>>> df = pd.DataFram>me m>({'A': [a], 'B': [b]})
>>> df
...
What is token-based authentication?
I want to understand what token-based authentication m>me m>ans. I searched the internet but couldn't find anything understandable.
...
Get the _id of inserted docum>me m>nt in Mongo database in NodeJS
I use NodeJS to insert docum>me m>nts in MongoDB. Using collection.insert I can insert a docum>me m>nt into database like in this code:
...
How to convert a string to lower or upper case in Ruby
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Ruby has a few m>me m>thods for changing the case of strings. To convert to lowercase, use downcase:
"hello Jam>me m>s!".downcase #=> "hello jam>me m>s!"
Similarly, upcase capitalizes every letter and capitalize capitalizes the first letter of th...
How to determine the screen width in terms of dp or dip at runtim>me m> in Android?
...de the layout of the android widgets using dip/dp (in java files). At runtim>me m> if I code,
int pixel=this.getWindowManager().getDefaultDisplay().getWidth() ;
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