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C# Passing Function as Argument [duplicate]
...s mentioned above works but there are also delegates that do the same task and also define intent within the naming:
public delegate double MyFunction(double x);
public double Diff(double x, MyFunction f)
{
double h = 0.0000001;
return (f(x + h) - f(x)) / h;
}
public double MyFunctionMet...
What's the best UI for entering date of birth? [closed]
...ed user I suggest using a datepicker. Since usually you also have advanced and non-advanced users I suggest a combination of text input and datepicker.
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Null or default comparison of generic argument in C#
...is respects IEquatable<T> (without boxing) as well as object.Equals, and handles all the Nullable<T> "lifted" nuances. Hence:
if(EqualityComparer<T>.Default.Equals(obj, default(T))) {
return obj;
}
This will match:
null for classes
null (empty) for Nullable<T>
zero/f...
MIT vs GPL license [closed]
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It seems to me that the chief difference between the MIT license and GPL is that the MIT doesn't require modifications be open sourced whereas the GPL does.
True - in general. You don't have to open-source your changes if you're using GPL. You could modify it and use it for your own purp...
How to identify whether a file is normal file or directory
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os.path.isdir() and os.path.isfile() should give you what you want. See:
http://docs.python.org/library/os.path.html
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Regex to replace everything except numbers and a decimal point
... is the code that I'm currently using to replace everything except numbers and a decimal point. Issue is, I can't figure out a regex that will identify everything else
...
Maven error “Failure to transfer…”
... in (*.lastUpdated) do del %i
Then rightclick on your project in eclipse and choose Maven->"Update Project ...", make sure "Update Dependencies" is checked in the resulting dialog and click OK.
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When to use a “has_many :through” relation in Rails?
I am trying to understand what has_many :through is and when to use it (and how). However, I am not getting it. I am reading Beginning Rails 3 and I tried Googling, but I am not able to understand.
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Clear file cache to repeat performance testing
...ther completely clear, or selectively remove cached information about file and directory contents.
9 Answers
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Convert hex string to int in Python
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x = int("deadbeef", 16)
With the 0x prefix, Python can distinguish hex and decimal automatically.
>>> print int("0xdeadbeef", 0)
3735928559
>>> print int("10", 0)
10
(You must specify 0 as the base in order to invoke this prefix-guessing behavior; omitting the second paramet...