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List comprehension with if statement
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Is Meyers' implementation of the Singleton pattern thread safe?
...r comments.
In C++03, this code wasn't thread safe. There is an article by Meyers called "C++ and the Perils of Double-Checked Locking" which discusses thread safe implementations of the pattern, and the conclusion is, more or less, that (in C++03) full locking around the instantiating method is ...
Converting dict to OrderedDict
...ry Pi. I am trying to print two dictionaries in order for comparison (side-by-side) for a text-adventure. The order is essential to compare accurately.
No matter what I try the dictionaries print in their usual unordered way.
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Is there a way to make ellipsize=“marquee” always scroll?
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By the way, we actually had problems with this solution, since it messes up stateful drawables: if you change drawables with focus-in/focus-out, then this will break. Took us almost an hour of debugging until we realized this...
Python string.join(list) on object array rather than string array
...y_string(',')
print comma.join(list)
and you get
name,name,name
BTW, by using list as variable name you are redefining the list class (keyword) ! Preferably use another identifier name.
Hope you'll find my answer useful.
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Use of 'use utf8;' gives me 'Wide character in print'
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Without use utf8 Perl interprets your string as a sequence of single byte characters. There are four bytes in your string as you can see from this:
$ perl -E 'say join ":", map { ord } split //, "鸡\n";'
233:184:161:10
The first three bytes make up your character, the last one is the line-...
Joda-Time: what's the difference between Period, Interval and Duration?
...r than of relative performance. From the documentation with comments added by me in italics:
An interval in Joda-Time represents an interval of time from one millisecond instant to another instant. Both instants are fully specified instants in the datetime continuum, complete with time zone. Spec...
How to set cookie in node js using express framework?
...__dirname + '/public'));
Also, middleware needs to either end a request (by sending back a response), or pass the request to the next middleware. In this case, I've done the latter by calling next() when the cookie has been set.
Update
As of now the cookie parser is a seperate npm package, so in...
How to play a local video with Swift?
I have a short mp4 video file that I've added to my current Xcode6 Beta project.
9 Answers
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How to return a part of an array in Ruby?
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Yes, Ruby has very similar array-slicing syntax to Python. Here is the ri documentation for the array index method:
--------------------------------------------------------------- Array#[]
array[index] -> obj...