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Grep characters before and after match?
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3 characters before and 4 characters after
$> echo "some123_string_and_another" | grep -o -P '.{0,3}string.{0,4}'
23_string_and
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Why XML-Serializable class need a parameterless constructor
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answered Nov 6 '08 at 5:37
cfedukecfeduke
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What are the differences between type() and isinstance()?
...th isinstance. The concept is obviously a growing one in Python, since PEP 3119, which introduces a generalization of it, was accepted and has been implemented starting with Python 2.6 and 3.0.
The PEP makes it clear that, while ABCs can often substitute for duck typing, there is generally no big p...
How to not wrap contents of a div?
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edited Sep 23 at 14:35
leonheess
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an...
How to merge 2 List and removing duplicate values from it in C#
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John Cummings
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answered Oct 27 '10 at 8:40
Adriaan StanderAdri...
Perform Segue programmatically and pass parameters to the destination view
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edited May 28 '12 at 10:39
answered May 28 '12 at 10:22
t...
Difference between Django's annotate and aggregate methods?
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3 Answers
3
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Injecting Mockito mocks into a Spring bean
I would like to inject a Mockito mock object into a Spring (3+) bean for the purposes of unit testing with JUnit. My bean dependencies are currently injected by using the @Autowired annotation on private member fields.
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Swift variable decorations with “?” (question mark) and “!” (exclamation mark)
...= 2
// The type here is "Implicitly Unwrapped Optional Int"
var z: Int! = 3
Usage:
// you can add x and z
x + z == 4
// ...but not x and y, because y needs to be unwrapped
x + y // error
// to add x and y you need to do:
x + y!
// but you *should* do this:
if let y_val = y {
x + y_val
}
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