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Convert interface{} to int
...ped value are these rules in the referenced specs parts:
Conversions are expressions of the form T(x) where T is a type and x is an expression that can be converted to type T.
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A non-constant value x can be converted to type T in any of these cases:
x is assignable to T.
x's type and T have i...
Curious null-coalescing operator custom implicit conversion behaviour
Note: this appears to have been fixed in Roslyn
5 Answers
5
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Why doesn't calling a Python string method do anything unless you assign its output?
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This is because strings are immutable in Python.
Which means that X.replace("hello","goodbye") returns a copy of X with replacements made. Because of that you need replace this line:
X.replace("hello", "goodbye")
with this line:
X = X.replace("hello", "goodbye")
More broadly, this is ...
Check if the number is integer
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Another alternative is to check the fractional part:
x%%1==0
or, if you want to check within a certain tolerance:
min(abs(c(x%%1, x%%1-1))) < tol
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Difference between object and class in Scala
... going over some Scala tutorials on the Internet and have noticed in some examples an object is declared at the start of the example.
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Can I install Python 3.x and 2.x on the same Windows computer?
...en you run a program on the command line. Will this break if I install a 2.x and 3.x version of Python on the same machine?
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Search for executable files using find command
What type of parameter/flag can I use with the Unix find command so that I search executables?
10 Answers
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Abusing the algebra of algebraic data types - why does this work?
The 'algebraic' expression for algebraic data types looks very suggestive to someone with a background in mathematics. Let me try to explain what I mean.
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How can I grep for a string that begins with a dash/hyphen?
I want to grep for the string that starts with a dash/hyphen, like -X , in a file, but it's confusing this as a command line argument.
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Polymorphism in C++
...o start from a simple test for and definition of it. Consider:
Type1 x;
Type2 y;
f(x);
f(y);
Here, f() is to perform some operation and is being given values x and y as inputs.
To exhibit polymorphism, f() must be able to operate with values of at least two distinct types (e...