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Auto-loading lib files in Rails 4
...ls.root.join('lib')
and keep the right naming convention in lib.
in lib/foo.rb:
class Foo
end
in lib/foo/bar.rb:
class Foo::Bar
end
if you really wanna do some monkey patches in file like lib/extensions.rb, you may manually require it:
in config/initializers/require.rb:
require "#{Rails.ro...
What is the “double tilde” (~~) operator in JavaScript? [duplicate]
... Right. It's primarily a stylistic choice, like the choice between Boolean(foo), (foo ? true : false), or !!foo when you want to cast a variable to a boolean.
– Patrick Fisher
Mar 17 '13 at 8:35
...
How do I get the path to the current script with Node.js?
...Current directory is a very different thing. If you run something like cd /foo; node bar/test.js, current directory would be /foo, but the script is located in /foo/bar/test.js.
– rjmunro
Jul 5 '18 at 11:20
...
How do I initialize the base (super) class?
...:
def __init__(self):
super(Y, self).__init__(123)
def doit(self, foo):
return super(Y, self).doit(foo)
Because python knows about old- and new-style classes, there are different ways to invoke a base method, which is why you've found multiple ways of doing so.
For completeness sake,...
Convert Python dict into a dataframe
........
u'2012-07-05': 392,
u'2012-07-06': 392}, orient='index', columns=['foo'])
Out[7]:
foo
2012-06-08 388
2012-06-09 388
2012-06-10 388
2012-06-11 389
2012-06-12 389
........
2012-07-05 392
2012-07-06 392
...
Get exception description and stack trace which caused an exception, all as a string
...) + '\n {} {}'.format(excp.__class__,excp)
A simple demonstration:
def foo():
try:
something_invalid()
except Exception as e:
print(exception_to_string(e))
def bar():
return foo()
We get the following output when we call bar():
File "./test.py", line 57, in <...
How to tell Jackson to ignore a field during serialization if its value is null?
...onInclusion(Include.NON_NULL);
or:
@JsonInclude(Include.NON_NULL)
class Foo
{
String bar;
}
Alternatively, you could use @JsonInclude in a getter so that the attribute would be shown if the value is not null.
A more complete example is available in my answer to How to prevent null values ins...
Forward declaring an enum in C++
...f incomplete types in declarations. Since it is legal to do struct S; void foo(S s); (note that foo is only declared, not defined), then there is no reason why we couldn't do enum E; void foo(E e); as well. In both cases, the size is not needed.
– Luc Touraille
...
How to delete multiple buffers in Vim?
...
I've just checked with c:/Program files/foo.bar, and even foo.bar.foo and it worked perfectly. fnameescape() may have been required if I used the buffer names. But I'm only checking whether the buffer names match a given expression: \.{ext}$ -- I give buffer number...
Show percent % instead of counts in charts of categorical variables
...ove:
require(ggplot2)
require(scales)
p <- ggplot(mydataf, aes(x = foo)) +
geom_bar(aes(y = (..count..)/sum(..count..))) +
## version 3.0.0
scale_y_continuous(labels=percent)
Here's a reproducible example using mtcars:
ggplot(mtcars, aes(x = factor(hp))) +
...