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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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git diff two files on same branch, same commit
... but the fact that he mentions BeyondCompare implies that he's not specifically looking for a git diff but simply an easy to read diff. Also the fact he accepted my answer as what he was looking for also indicates that it does in fact answer it.
– JaredMcAteer
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Dynamic instantiation from string name of a class in dynamically imported module?
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You can use getattr
getattr(module, class_name)
to access the class. More complete code:
module = __import__(module_name)
class_ = getattr(module, class_name)
instance = class_()
As mentioned below, we may use importlib
import importlib
module = importlib.imp...
Getting a random value from a JavaScript array
... @SapphireSun this is correct. Note the Math.floor(Math.random(...)) call, which rounds down.
– ashes999
Jan 19 '14 at 12:43
34
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iPhone - Get Position of UIView within entire UIWindow
...If your superView did not have a superView your view should not be seen at all
– user4951
Mar 19 '13 at 3:41
17
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Using custom std::set comparator
...should use a functor (a class that overloads the () operator so it can be called like a function).
struct lex_compare {
bool operator() (const int64_t& lhs, const int64_t& rhs) const {
stringstream s1, s2;
s1 << lhs;
s2 << rhs;
return s1.str()...
The type or namespace name 'Objects' does not exist in the namespace 'System.Data'
... Server to create an n-tier app. I am creating some base classes common to all my DAL components. In this base class, i want to handle the connection state of the ObjectContext base class inherited by entities object.
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How to get a reference to current module's attributes in Python
...he way I typically see this done is like this:
import sys
dir(sys.modules[__name__])
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What is a NullReferenceException, and how do I fix it?
.... This means you either set it to null, or you never set it to anything at all.
Like anything else, null gets passed around. If it is null in method "A", it could be that method "B" passed a null to method "A".
null can have different meanings:
Object variables which are uninitialized and hence poi...
Delete multiple objects in django
...sing a webpage. There is no category to select from so I can't delete from all of them like that. Do I have to implement my own delete form and process it in django or does django have a way to already do this? As its implemented in the admin interface.
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