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Determining type of an object in ruby
... the "type" of an object, which is a wobbly term in the Ruby world, is to call object.class.
Since classes can inherit from other classes, if you want to determine if an object is "of a particular type" you might call object.is_a?(ClassName) to see if object is of type ClassName or derived from it....
postgres default timezone
I installed PostgreSQL 9 and the time it is showing is 1 hour behind the server time.
7 Answers
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Selecting element by data attribute
...d to select elements based on their data attribute? For example, select all anchors that has data attribute named customerID which has value of 22 .
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How do I disable log messages from the Requests library?
...WARNING)
If you wish to apply this setting for the urllib3 library (typically used by requests) too, add the following:
logging.getLogger("urllib3").setLevel(logging.WARNING)
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What's the complete range for Chinese characters in Unicode?
U+4E00..U+9FFF is part of the complete set,but not all
6 Answers
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How to Sort a List by a property in the object
I have a class called Order which has properties such as OrderId , OrderDate , Quantity , and Total . I have a list of this Order class:
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Dealing with multiple Python versions and PIP?
...ple versions of Python? For example, I want to use pip to explicitly install things to either my site 2.5 installation or my site 2.6 installation.
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NumPy array initialization (fill with identical values)
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On my system (Python 2.7, Numpy 1.8), np.full() is actually slightly slower than np.empty() followed by np.fill().
– John Zwinck
Jul 25 '14 at 8:37
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What is the 'instanceof' operator used for in Java?
... Dog is Dog
dog instanceof Object // true - Object is the parent type of all objects
However, with Object animal = new Animal();,
animal instanceof Dog // false
because Animal is a supertype of Dog and possibly less "refined".
And,
dog instanceof Cat // does not even compile!
This is beca...
Replace whole line containing a string using Sed
...cusDowning GNU sed does not require the space; it works just fine as originally posted. If your particular sed requires the space, then by all means note which sed is incompatible and add the necessary invocation as a comment. However, please don't change working code in an accepted answer.
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