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How to sort with a lambda?
I'd like to use a lambda function to sort custom classes in place of binding an instance method. However, the code above yields the error:
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What does “:=” do?
I've seen := used in several code samples, but never with an accompanying explanation. It's not exactly possible to google its use without knowing the proper name for it.
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How to pass boolean values to a PowerShell script from a command prompt
I have to invoke a PowerShell script from a batch file. One of the arguments to the script is a boolean value:
10 Answers
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How to check if any flags of a flag combination are set?
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If you want to know if letter has any of the letters in AB you must use the AND & operator. Something like:
if ((letter & Letters.AB) != 0)
{
// Some flag (A,B or both) is enabled
}
else
{
// None of them are enabled
}
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Iterating over every two elements in a list
...lementation.
For Python 2:
from itertools import izip
def pairwise(iterable):
"s -> (s0, s1), (s2, s3), (s4, s5), ..."
a = iter(iterable)
return izip(a, a)
for x, y in pairwise(l):
print "%d + %d = %d" % (x, y, x + y)
Or, more generally:
from itertools import izip
def group...
Why should I use a pointer rather than the object itself?
I'm coming from a Java background and have started working with objects in C++. But one thing that occurred to me is that people often use pointers to objects rather than the objects themselves, for example this declaration:
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What's wrong with overridable method calls in constructors?
... Wicket page class that sets the page title depending on the result of an abstract method.
7 Answers
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Script parameters in Bash
I'm trying to make a shell script which should be used like this:
5 Answers
5
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Rotating a two-dimensional array in Python
...for the optimal solution I found this impressive one-liner that does the job:
7 Answers
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Java SafeVarargs annotation, does a standard or best practice exist?
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1) There are many examples on the Internet and on StackOverflow about the particular issue with generics and varargs. Basically, it's when you have a variable number of arguments of a type-parameter type:
<T> void foo(T... args);
In Java, varargs are a syntactic sugar that undergo...