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How do I pick randomly from an array?
...
Just use Array#sample:
[:foo, :bar].sample # => :foo, or :bar :-)
It is available in Ruby 1.9.1+. To be also able to use it with an earlier version of Ruby, you could require "backports/1.9.1/array/sample".
Note that in Ruby 1.8.7 it exists un...
Android Studio: Add jar as library?
...d.gradle file, but it seemed to use absolute paths to the libraries (/libs/foo.jar). I change these to relative paths (libs/foo.jar), which fixed the problem for me.
– Matt Holgate
Oct 22 '13 at 13:25
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Can pandas automatically recognize dates?
..., 3]] -> combine columns 1 and 3 and parse as a single date
column. {‘foo’ : [1, 3]} -> parse columns 1, 3 as date and call result ‘foo’
The default sensing of dates works great, but it seems to be biased towards north american Date formats. If you live elsewhere you might occasion...
NameError: name 'self' is not defined
...y if you try to reference values for that object inside the function.
def foo():
print(self.bar)
>NameError: name 'self' is not defined
def foo(self):
print(self.bar)
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How to pass anonymous types as parameters?
... (when extracting data) is to also pass a selector - i.e. something like:
Foo<TSource, TValue>(IEnumerable<TSource> source,
Func<TSource,string> name) {
foreach(TSource item in source) Console.WriteLine(name(item));
}
...
Foo(query, x=>x.Title);
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How to specialize std::hash::operator() for user-defined type in unordered containers?
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You are expressly allowed and encouraged to add specializations to namespace std*. The correct (and basically only) way to add a hash function is this:
namespace std {
template <> struct hash<Foo>
{
size_t operator()(const...
How to get “their” changes in the middle of conflicting Git rebase?
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You want to use:
git checkout --ours foo/bar.java
git add foo/bar.java
If you rebase a branch feature_x against master (i.e. running git rebase master while on branch feature_x), during rebasing ours refers to master and theirs to feature_x.
As pointed out in...
Best practices for API versioning? [closed]
...e same time the most prominent part of a REST API and, therefore, a potentially long-term commitment towards the users of that API.
Since evolution of an application and, to a lesser extent, its API is a fact of life and that it's even similar to the evolution of a seemingly complex product like a ...
Rails Console: reload! not reflecting changes in model files? What could be possible reason?
... method on an object. Eg, if you change the definition of the class method foo(), then in the console a.foo will not use the new definition unless you first reload a.
– jpw
Jun 12 '13 at 0:29
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What is a magic number, and why is it bad? [closed]
..., the fact that Passwords can be a maximum of 7 characters long is not globally defined and actually differs, so that is a candidate for a variable.
– Michael Stum♦
Sep 19 '09 at 1:02
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