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Representing null in JSON
...This is not the same as both "not undefined and not null", and if you were testing for one condition or the other, this might succeed whereas JSON1 would fail.
This is the definitive way to represent null per the JSON spec.
JSON3 {"myCount": 0}
In this case, myCount is 0. That's not the same as nul...
Map vs Object in JavaScript
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My tests in Chrome showed that maps to not use any significant amount more memory for maintaining order. I thing there was 0.1KB more for a million keys and I don't think that was for maintaining order. However, that ~0.1KB seem...
How can you determine a point is between two other points on a line segment?
...yes's chapter in Beautiful Code covers the design space for a collinearity-test function -- useful background. Vincent's answer helped to improve this one. And it was Hayes who suggested testing only one of the x or the y coordinates; originally the code had and in place of if a.x != b.x else.
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Loading custom configuration files
...figMap = new ExeConfigurationFileMap();
configMap.ExeConfigFilename = @"d:\test\justAConfigFile.config.whateverYouLikeExtension";
Configuration config = ConfigurationManager.OpenMappedExeConfiguration(configMap, ConfigurationUserLevel.None);
If need to access a value within the config you can use ...
Parse a .py file, read the AST, modify it, then write back the modified source code
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Pythoscope does this to the test cases it automatically generates as does the 2to3 tool for python 2.6 (it converts python 2.x source into python 3.x source).
Both these tools uses the lib2to3 library which is a implementation of the python parser/com...
What is the difference between memmove and memcpy?
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You may have noticed that the memmove implementation above doesn't even test if they actually do overlap, it just checks their relative positions, but that alone will make the copy safe. As memcpy usually uses the fastest way possible to copy memory on any system, memmove is usually rather implem...
Is it pythonic to import inside functions?
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I've broken this rule before for modules that are self-testing. That is, they are normally just used for support, but I define a main for them so that if you run them by themselves you can test their functionality. In that case I sometimes import getopt and cmd just in main, b...
Differences between Java 8 Date Time API (java.time) and Joda-Time
...DateTimeUtils instead. So this way Joda-Time is also capable of supporting test-driven models with different clocks (mocking etc.).
Duration arithmetic
Both libraries support the calculation of time distances in one or more temporal units. However, when handling single-unit-durations the JSR-310-s...
How to determine equality for two JavaScript objects?
...ense requirements and move on. It's by far the most comprehensive equality test mentioned on stackoverflow.
– Dale Anderson
Sep 7 '12 at 10:15
7
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How to reverse a 'rails generate'
...e ("p" for pretend).
If you add this to the command it will simply do a "test" run and show you what files will be deleted without actually deleting them.
$ rails d controller welcome -p
remove app/controllers/welcome_controller.rb
invoke erb
remove app/views/welcome
invoke test_un...