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Do sealed classes really offer performance Benefits?
... on the topic.
Note that any kind of performance benefit you would obtain from this level of optimization should be regarded as last-resort, always optimize on the algorithmic level before you optimize on the code-level.
Here's one link mentioning this: Rambling on the sealed keyword
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Adding multiple class using ng-class
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you'll be surprised: <a href="#/u/[[msg.from]]" ng-bind="msg.from" class="name, ng-class:[users[msg.from].nice, users[msg.from].star];" ng-class="{premium: users[msg.from].premium}"></a> and more: scotch.io/tutorials/javascript/the-many-ways-to-use-ngclass...
How to check whether a string contains a substring in Ruby
...e succinct idiom than the accepted answer above that's available in Rails (from 3.1.0 and above) is .in?:
my_string = "abcdefg"
if "cde".in? my_string
puts "'cde' is in the String."
puts "i.e. String includes 'cde'"
end
I also think it's more readable.
See the in? documentation for more info...
How to debug Ruby scripts [closed]
I copied the following Ruby code from the Internet and made a few changes but it doesn't work.
17 Answers
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Is it possible to reference one CSS rule within another?
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No, you cannot reference one rule-set from another.
You can, however, reuse selectors on multiple rule-sets within a stylesheet and use multiple selectors on a single rule-set (by separating them with a comma).
.opacity, .someDiv {
filter:alpha(opacity=60)...
Why would you use an ivar?
...hiving/serialization implementations.
It's also more frequent as one moves from the everything has a public readwrite accessor mindset to one which hides its implementation details/data well. Sometimes you need to correctly step around side effects a subclass' override may introduce in order to do t...
What's quicker and better to determine if an array key exists in PHP?
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Up from the dead... but I also re-ran the benchmark, and made a tweak so the second for loop has to initialize it's own counter and to clear the result array. It shows "isset || null" being faster. codepad.org/Np6oPvgS
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Handler vs AsyncTask
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From Honeycomb on, AsyncTasks are executed on one thread, so no parallelism anymore. You still could run them on a paralel Executor implementation.
– MrSnowflake
May 6 '13 at 15:27
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Start thread with member function
...ream>
class bar {
public:
void foo() {
std::cout << "hello from member function" << std::endl;
}
};
int main()
{
std::thread t(&bar::foo, bar());
t.join();
}
EDIT:
Accounting your edit, you have to do it like this:
std::thread spawn() {
return std::thread(&a...
Why are global variables evil? [closed]
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@CorleyBrigman: singleton classes actually often suffer from the same problems typically attributed to globals :)
– Erik Kaplun
Oct 3 '13 at 13:40
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