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Inner class within Interface
...uestion: it can be done and this is one kind of use I've seen made of it.
Now I won't comment on the usefulness of such a construct and from I've seen: I've seen it, but it's not a very common construct.
200KLOC codebase here where this happens exactly zero time (but then we've got a lot of other ...
How do I log a Python error with debug information?
...pplication does logging some other way – not using the logging module?
Now, traceback could be used here.
import traceback
def log_traceback(ex, ex_traceback=None):
if ex_traceback is None:
ex_traceback = ex.__traceback__
tb_lines = [ line.rstrip('\n') for line in
...
Calling Java varargs method with single null argument?
...
The issue is that when you use the literal null, Java doesn't know what type it is supposed to be. It could be a null Object, or it could be a null Object array. For a single argument it assumes the latter.
You have two choices. Cast the null explicitly to Object or call the method u...
How to convert an iterator to a stream?
... targetStream = StreamSupport.stream(
Spliterators.spliteratorUnknownSize(sourceIterator, Spliterator.ORDERED),
false);
An alternative which is maybe more readable is to use an Iterable - and creating an Iterable from an Iterator is very easy with lambdas because Iterable is a f...
How to go to each directory and execute a command?
... If by easier you mean broken then yes, there are easier ways of doing. Now don't worry, all these IFS and read (as you say) become a second nature as you get used to them… they are part of the canonical and idiomatic ways of writing scripts.
– gniourf_gniourf
...
Best practice to mark deprecated code in Ruby?
... check their code and catch up. In Java you set @Deprecated and everybody knows what this means.
11 Answers
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^M at the end of every line in vim
...trip out the DOS line endings is to use the ff option:
:set ff=unix
:wq
Now your file is back to the good-old-Unix-way.
If you want to add the DOS line-endings (to keep a printer happy, or transfer files with Windows friends who don't have nice tools) you can go the opposite direction easily:
:...
Is it possible to create static classes in PHP (like in C#)?
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I know this is pretty old, but now you could use magic __callStatic so when you call any static method or anything, it will first call __callStatic, there you could see if it was initialized and then do self::$method or whatever...
Java Hashmap: How to get key from value?
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Apache Collections now supports generics commons.apache.org/proper/commons-collections/javadocs/…
– kervin
May 31 '15 at 16:28
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puts vs logger in rails rake tasks
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Rake tasks are run by a user, on a command-line. Anything they need to know right away ("processed 5 rows") should be output on the terminal with puts.
Anything that needs to be kept for posterity ("sent warning email to jsmith@example.com") should be sent to the Rails.logger.
...