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Passing multiple error classes to ruby's rescue clause in a DRY fashion
...operator *.
EXCEPTIONS = [FooException, BarException]
begin
a = rand
if a > 0.5
raise FooException
else
raise BarException
end
rescue *EXCEPTIONS
puts "rescued!"
end
If you are going to use a constant for the array as above (with EXCEPTIONS), note that you cannot define it w...
Best practice for localization and globalization of strings and labels [closed]
...No offense but isn't this what Afshin already tried? He's problem is that different developers have difficulty remembering which keys to use. I agree with that your described method is the way to go. I don't see how it can be otherwise. Thanks for the great links btw.
– Spock
...
Are empty HTML5 data attributes valid?
...like to write a simple jQuery plugin that displays inline modals under specified elements. My idea is for the script to auto-init based on data attributes specified on elements.
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Java Class that implements Map and keeps insertion order?
... remove, according to the Javadocs, while LinkedHashMap is O(1) for each.
If your API that only expects a predictable sort order, as opposed to a specific sort order, consider using the interfaces these two classes implement, NavigableMap or SortedMap. This will allow you not to leak specific imple...
how to get the host url using javascript from the current page
...stname;
or possibly
var host = "http://"+window.location.hostname;
or if you like concatenation
var protocol = location.protocol;
var slashes = protocol.concat("//");
var host = slashes.concat(window.location.hostname);
...
How do I pass multiple attributes into an Angular.js attribute directive?
...rective can access any attribute that is defined on the same element, even if the directive itself is not the element.
Template:
<div example-directive example-number="99" example-function="exampleCallback()"></div>
Directive:
app.directive('exampleDirective ', function () {
ret...
How do I get the picture size with PIL?
...
If you also want to know the number of channels, you should use im.mode. Since PIL is a bit cryptic, you can also use numpy: numpy.array(im).shape
– Alex Kreimer
Jun 17 '17 at 17:26
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How to synchronize a static variable among threads running different instances of a class in Java?
...ur day. Also, class initialization runs with a lock on the class held, so if you've got crazy class initializers you can give yourself headaches. volatile doesn't help for count++ because it's a read / modify / write sequence. As noted in a different answer, java.util.concurrent.atomic.AtomicInte...
“find: paths must precede expression:” How do I specify a recursive search that also finds files in
...
By way of example, you can see what's happening if you do echo *test.c ... the result won't be echo expanding the wildcard, but the shell itself. The simple lesson is if you're using wildcards, quote the filespec :-)
– Chris J
Jun 27 ...
How to understand nil vs. empty vs. blank in Ruby
I find myself repeatedly looking for a clear definition of the differences of nil? , blank? , and empty? in Ruby on Rails. Here's the closest I've come:
...