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Split data frame string column into multiple columns
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Use stringr::str_split_fixed
library(stringr)
str_split_fixed(before$type, "_and_", 2)
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How do I get the path of the current executed file in Python?
This may seem like a newbie question, but it is not. Some common approaches don't work in all cases:
13 Answers
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How to dynamically load a Python class
...e.g. my_package.my_module.MyClass , what is the best possible way to load it?
10 Answers
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How to determine a Python variable's type?
How do I see the type of a variable whether it is unsigned 32 bit, signed 16 bit, etc.?
17 Answers
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How to get the caller's method name in the called method?
...me: f1
this introspection is intended to help debugging and development; it's not advisable to rely on it for production-functionality purposes.
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Chain-calling parent initialisers in python [duplicate]
Consider this - a base class A, class B inheriting from A, class C inheriting from B. What is a generic way to call a parent class initialiser in an initialiser? If this still sounds too vague, here's some code.
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transform object to array with lodash
How can I transform a big object to array with lodash?
11 Answers
11
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'is' versus try cast with null check
...ast a second time
// before using it as a MyType
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}
to this:
var myObjRef = myObj.myProp as MyType; // only one cast
if (myObjRef != null)
{
// myObjRef is already MyType and doesn't need to be cast again
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}
C# 7.0 supports a more com...
Unmangling the result of std::type_info::name
...nfo class. This contains the name of the typeid'd class/function/etc. but it's mangled. It's not very useful. I.e. typeid(std::vector<int>).name() returns St6vectorIiSaIiEE .
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What is the difference between class and instance attributes?
... a.foo.append(5)
>>> b.foo
[5]
>>> class A:
... def __init__(self): self.foo = []
>>> a, b = A(), A()
>>> a.foo.append(5)
>>> b.foo
[]
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