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What is a NullPointerException, and how do I fix it?
...In this example, the variable x is an int and Java will initialize it to 0 for you. When you assign it the value of 10 on the second line, your value of 10 is written into the memory location referred to by x.
But, when you try to declare a reference type, something different happens. Take the follo...
overlay two images in android to set an imageview
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Works well for my needs (I used the code approach). I have a number of 'tiles' which the user taps on to navigate around the app. Using this approach I was able to have a single background image (common to all tiles) and numerous foregr...
What's the difference between Spring Data's MongoTemplate and MongoRepository?
...ol over what to execute.
As the repository programming model is available for multiple Spring Data modules, you'll find more in-depth documentation for it in the general section of the Spring Data MongoDB reference docs.
TL;DR
We generally recommend the following approach:
Start with the reposi...
How do I efficiently iterate over each entry in a Java Map?
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Map<String, String> map = ...
for (Map.Entry<String, String> entry : map.entrySet()) {
System.out.println(entry.getKey() + "/" + entry.getValue());
}
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Python: Get relative path from comparing two absolute paths
...he relative paths:
relative_paths = [os.path.relpath(path, common_prefix) for path in paths]
You can even handle more than two paths, with this method, and test whether all the paths are all below one of them.
PS: depending on how your paths look like, you might want to perform some normalizatio...
Using multiple delimiters in awk
... can be useful, but can make things tricky ... as there are often spaces before and after 'this', this will make 2 extra empty field appear in between the space(s) and 'this')
– Olivier Dulac
Oct 15 '14 at 13:36
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How to set default values in Rails?
I'm trying to find the best way to set default values for objects in Rails.
17 Answers
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What's the best way to unit test protected & private methods in Ruby?
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Here's one easy way if you use RSpec:
before(:each) do
MyClass.send(:public, *MyClass.protected_instance_methods)
end
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Converting NumPy array into Python List structure?
How do I convert a NumPy array to a Python List (for example [[1,2,3],[4,5,6]] ), and do it reasonably fast?
5 Answers
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How do I reset a sequence in Oracle?
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Here is a good procedure for resetting any sequence to 0 from Oracle guru Tom Kyte. Great discussion on the pros and cons in the links below too.
tkyte@TKYTE901.US.ORACLE.COM>
create or replace
procedure reset_seq( p_seq_name in varchar2 )
is
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