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Difference between wait() and sleep()
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A wait can be "woken up" by another thread calling notify on the monitor which is being waited on whereas a sleep cannot. Also a wait (and notify) must happen in a block synchronized on the monitor object whereas sleep does not:
Object mon = ...;
synchronized (mon) {
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How do you remove the title text from the Android ActionBar?
...l the methods? I mean from which method (activity, fragment) should it be called?
– ka3ak
Oct 13 '18 at 10:53
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Rails: How does the respond_to block work?
...html
The Responder does NOT contain a method for .html or .json, but we call these methods anyways! This part threw me for a loop.
Ruby has a feature called method_missing. If you call a method that doesn't exist (like json or html), Ruby calls the method_missing method instead.
http://ruby-meta...
Rails extending ActiveRecord::Base
...the ActiveSupport::Concern documentation for more details.
Create a file called active_record_extension.rb in the lib directory.
require 'active_support/concern'
module ActiveRecordExtension
extend ActiveSupport::Concern
# add your instance methods here
def foo
"foo"
end
# add y...
How do I install Maven with Yum?
...b/apache/maven/maven-3/3.0.5/binaries/apache-maven-3.0.5-bin.tar.gz
basically just go to the maven site. Find the version of maven you want. The file type and use the mirror for the wget statement above.
Afterwards the process is easy
Run the wget command from the dir you want to extract maven ...
Which version of Python do I have installed?
... server. How can I know which version of Python I have, and does it even really matter?
22 Answers
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PreparedStatement IN clause alternatives?
... FROM my_table WHERE search_column = ? ; ... and execute it. [Or use UNION ALL in place of those semicolons. --ed] Requires one prepared statement per size-of-IN-list. Stupidly slow, strictly worse than WHERE search_column IN (?,?,?), so I don't know why the blogger even suggested it.
Use a stored p...
Comparing two files in linux terminal
There are two files called "a.txt" and "b.txt" both have a list of words. Now I want to check which words are extra in "a.txt" and are not in "b.txt" .
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How to force NSLocalizedString to use a specific language
... the one set by the user for their phone, and the subsequent ones used as fallbacks if a resource is not available in the preferred language. (on the desktop, the user can specify multiple languages with a custom ordering in System Preferences)
You can override the global setting for your own appl...
How do I fix PyDev “Undefined variable from import” errors?
...ncing the same issue with latest Eclipse and PyDev. I can navigate between all modules, so why code-analysis can't do the same?
– Adam
Sep 3 '14 at 11:41
3
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